Tulsa, OK 74104 • (42.9 miles) • Full Time • 9/15/2025

We. Are. OneStaff. Medical. An independently-owned, nationally-recognized and amazingly awesome staffing firm ready to work for you! A work ethic forged in the Midwest, we are here to stand by your side and help you find your dream assignment anywhere in this great country. We want the same like-minded, awesome candidates to travel with us. Be bold. Enjoy work again. Let us help. THE POSITION: Cardiovascular Operating Room Technologist diagnose heart (cardiac) and blood vessel (peripheral vascular) problems at the direction of a supervising physician. *Weekly amount stated in the job postings is scaled based on estimated hourly wages and potential stipends available for the location of the assignment. Hourly wages are based on various factors including but not limited to: experi

Catoosa, OK 74015 • (30.8 miles) • Full Time • 9/21/2025

Details Department:Observation UnitSchedule:Full-time, Night Shift, 7pm-7am, 12hr shifts, 36hrs per weekHospital:Ascension St. John Medical CenterLocation:Tulsa, OKBenefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Coordinate unit staffing and provides leadership while ensuring implementation of clinical objectives and quality patien

Catoosa, OK 74015 • (30.8 miles) • Full Time • 9/21/2025

Details Department:Clinical Professional DevelopmentSchedule:FT, Monday-Friday, 8am-4:30pmHospital:Ascension St. John's Medical CenterLocation:Tulsa, OKBenefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Assess, plan, implement and evaluate educational activities related to nursing clinical areas across the continuum of care. Serves a

Catoosa, OK 74015 • (30.8 miles) • Full Time • 9/4/2025

Details Department:Medical Surgical UnitSchedule:Full Time, Night Shift, 3-12 Hour Shifts Per WeekHospital:Ascension St. John Medical CenterLocation:Tulsa, OK.Benefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Provide direct nursing care in accordance with established policies, procedures and protocols of the healthcare organization.

Catoosa, OK 74015 • (30.8 miles) • Full Time • 8/28/2025

Details Department: Medical TelemetrySchedule: Full-time, Day Shift, 7am-7pm, 36hrs per weekHospital: Ascension St. John Medical CenterLocation: Tulsa, OKRelocation assistance available!Benefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Provide direct nursing care in accordance with established policies, procedures and protocols of t

Catoosa, OK 74015 • (30.8 miles) • Full Time • 8/28/2025

Details Department: InpatientPost SurgicalUnitSchedule:Full-time, Day Shift, 7am-7pm, 12hr shifts, WEEKEND OPTIONHospital:Ascension St. John Medical CenterLocation:Tulsa, OKBenefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Provide direct nursing care in accordance with established policies, procedures and protocols of the healthcare

Catoosa, OK 74015 • (30.8 miles) • Full Time • 9/21/2025

Details Weekly Travel Rate up to $1,387 - $2,170Department:Associate Travel Program - Telemetry RNSchedule:Night shifts available, 36 hours per weekHospital:Multiple Ascension acute care hospitalsLocation:Local and national travel options are available depending on need.This position is a permanent, full time position made up of 8-13 week travel assignments - not a short term option or temporary contract.Rates may vary by location and specialty.For more information about the internal Ascension Travel Program,please visit our site.Benefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give

Catoosa, OK 74015 • (30.8 miles) • Full Time • 9/21/2025

Details Department:12 East - Progressive CareSchedule:Full time, Night Shift 7p-7aHospital:Ascension St. JohnLocation:Tulsa, OKBenefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Provide direct nursing care in accordance with established policies, procedures and protocols of the healthcare organization.Implement and monitor patient ca

Catoosa, OK 74015 • (30.8 miles) • Full Time • 8/29/2025

Details Department: Neuro Stepdown UnitSchedule:Full time, Night shift, 7pm-7m, 12hrs per week, 36hrs per weekHospital:Ascension St. John Medical CenterLocation:Tulsa, OKRelocation assistance available!Benefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Provide direct nursing care in accordance with established policies, procedures an

Catoosa, OK 74015 • (30.8 miles) • Full Time • 8/30/2025

Details Department:Ortho Neuro TraumaSchedule: Full time DayShiftHospital:Ascension St. John Medical CenterLocation:Tulsa, OKBenefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Provide direct nursing care in accordance with established policies, procedures and protocols of the healthcare organization.Implement and monitor patient care

Catoosa, OK 74015 • (30.8 miles) • Full Time • 8/29/2025

Details Department:Post Surgical Cardiac Stepdown UnitSchedule:Full-time, Night Shift, 7pm-7am,12hr shifts, 36hrs per weekHospital:Ascension St. John Medical CenterLocation:Tulsa, OK*Relocation assistance available!Benefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Provide direct nursing care in accordance with established policies,

Catoosa, OK 74015 • (30.8 miles) • Full Time • 8/29/2025

Details Department: Total Quality ManagementSchedule: FT, Monday-Friday, 8am-5pmHospital: Ascension St. John Medical CenterLocation: Tulsa, OKBenefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Serve as a patient navigator throughout the continuum of care.Function as a liaison for management staff, administration, physicians, managed

Catoosa, OK 74015 • (30.8 miles) • Full Time • 9/21/2025

Details Department:Post Cath Lab Cardiac Stepdown UnitSchedule:Full-time, Night Shift, 7pm-7am, 12hr shifts, 36hrs per weekHospital:Ascension St. John Medical CenterLocation:Tulsa, OK*Relocation assistance available!Benefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Provide direct nursing care in accordance with established policies,

Catoosa, OK 74015 • (30.8 miles) • Full Time • 9/21/2025

Details Department: Med SurgSchedule: Full-time Weekend optionHospital: Ascension St. John Medical CenterLocation: Tulsa, OK*Relocation assistance available!Benefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Provide direct nursing care in accordance with established policies, procedures and protocols of the healthcare organization.Im

Catoosa, OK 74015 • (30.8 miles) • Full Time • 9/21/2025

Details Department:Post Surgical Cardiac StepdownSchedule:Full-time, Day Shift, 7am-7pm, 12hr shifts, 36hrs per weekHospital: Ascension St John Medical CenterLocation: Tulsa, Oklahoma*Relocation assistance available!Benefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Provide direct nursing care in accordance with established policies,

Catoosa, OK 74015 • (30.8 miles) • Full Time • 9/21/2025

Details Department:12 East - Progressive CareSchedule:Full time, Day Shift 7a-7p, 36 hours a weekHospital:Ascension St. JohnLocation:Tulsa, OKRelocation assistance available!Benefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Provide direct nursing care in accordance with established policies, procedures and protocols of the healthcar

Catoosa, OK 74015 • (30.8 miles) • Full Time • 9/21/2025

Details Department:Telemetry/Kidney TransplantSchedule:Full-time, Night Shift, 7pm-7am, 12hr shifts, 36hrs per week, WEEKEND OPTIONHospital:Ascension St. John Medical CenterLocation:Tulsa, OKBenefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Provide direct nursing care in accordance with established policies, procedures and protocols

Catoosa, OK 74015 • (30.8 miles) • Full Time • 8/25/2025

Details Department: Inpatient Post SurgicalSchedule: Full-time, Night Shift, 7pm-7am, 12hr shifts, 36hrs per weekHospital: Ascension St. John Medical CenterLocation: Tulsa, OKBenefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Coordinate unit staffing and provide leadership while ensuring implementation of clinical objectives and qual

Catoosa, OK 74015 • (30.8 miles) • Full Time • 9/21/2025

Details Department: Neuro Stepdown UnitSchedule:Full time, Night shift, 7pm-7m, 12hrs per week, 36hrs per weekHospital:Ascension St. John Medical CenterLocation:Tulsa, OKRelocation assistance available!Benefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Provide direct nursing care in accordance with established policies, procedures an

Tulsa, OK 74104 • (42.9 miles) • Full Time • 9/9/2025

Details Department:Emergency DepartmentSchedule:Full-time, Night Shift, 7pm-7am, 12hr shifts, 36hrs per weekHospital:Ascension St. John Medical CenterLocation:Tulsa, OKPrevious RN experience requiredBenefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Implement and monitor patient care plans.Monitor, record, and communicate patient con

Tulsa, OK 74104 • (42.9 miles) • Full Time • 9/18/2025

Details Department: CTSchedule: Weekend OptionNegotiable on days and timesHospital: Ascension St. John Medical CenterLocation: Tulsa, OKNew Grads Welcome! Will train!Benefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Prepare and position patients and selects anatomic and technical parameters accurately.Prepare and administer contrast

Tulsa, OK 74104 • (42.9 miles) • Full Time • 8/27/2025

Details Department:Cardiovascular Cath LabSchedule:Full Time Day Shift, Monday through Friday, 7:30am - 4:00pmCall required. Must be able to work occasional night, weekend, or holiday.Hospital:Ascension St. John Medical CenterLocation:Tulsa, OKBenefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Perform active physiological monitoring

Tulsa, OK 74104 • (42.9 miles) • Full Time • 8/27/2025

Details Department: General Radiology / SurgerySchedule: Saturday / Sunday 7:00am - 3:30pm. 2 additional10 hour shifts within Monday - Friday. 7:00am - 5:30pm.Hospital: Ascension St. John Medical CenterLocation: Tulsa, OKBenefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Take radiologic films providing quality images to physicians to

Tulsa, OK 74104 • (42.9 miles) • Full Time • 8/27/2025

Details Department: General Radiology / SurgerySchedule: Saturday / Sunday 7:00am - 3:30pm. 2 additional10 hour shifts within Monday - Friday. 7:00am - 5:30pm.Hospital: Ascension St. John Medical CenterLocation: Tulsa, OKBenefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Take radiologic films providing quality images to physicians to

Tulsa, OK 74104 • (42.9 miles) • Full Time • 9/21/2025

Details Department:General RadiologySchedule: NightsOptions:4, 10 hour shifts 9:00pm - 7:00amFriday 7:00pm - 9:00am, Saturday 7:00pm - 9:00am, Sunday 7:00pm - 7:00amHospital:Ascension St JohnMedical CenterLocation:Tulsa, OKBenefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Take radiologic films providing quality images to physicians

Tulsa, OK 74104 • (42.9 miles) • Full Time • 9/21/2025

Details Department:General RadiologySchedule: NightsOptions:4, 10 hour shifts 9:00pm - 7:00amFriday 7:00pm - 9:00am, Saturday 7:00pm - 9:00am, Sunday 7:00pm - 7:00amHospital:Ascension St JohnMedical CenterLocation:Tulsa, OKBenefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Take radiologic films providing quality images to physicians

Tulsa, OK 74104 • (42.9 miles) • Full Time • 8/30/2025

Details Sign-on Bonus: Up to $15,000Department: Respiratory TherapySchedule: Full Time, Day ShiftHospital: Ascension St. John Medical CenterLocation: Tulsa, OKRelocation assistance available!Benefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Provide evaluation of and care for patients with respiratory insufficiencies.Assess patient f

Tulsa, OK 74104 • (42.9 miles) • Full Time • 8/30/2025

Details Department: Sleep LabSchedule: Nights. 3, 12 hour shifts.Hospital: Ascension St. John Medical CenterLocation: Tulsa, OKBenefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Perform basic and advanced diagnostic sleep studies.Prepare patient and equipment for ordered testing. Interview patient to determine sleep disorder issues a

Tulsa, OK 74104 • (42.9 miles) • Full Time • 8/27/2025

Details Sign-on Bonus: Up to $15,000Department: Respiratory TherapySchedule: NightsHospital: Ascension St. John Medical CenterLocation: Tulsa, OKRelocation assistance also available!Benefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Provide evaluation of and care for patients with respiratory insufficiencies.Assess patient for approp

Tulsa, OK 74104 • (42.9 miles) • Full Time • 8/27/2025

Details Salary: $8/hr differential on top of base payDepartment: Respiratory TherapySchedule: NightsHospital: Ascension St. John Medical Center and Ascension St. John Community HospitalsLocation: Tulsa, OK areaRelocation assistance also available!Benefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Provide evaluation of and care for pa

Tulsa, OK 74104 • (42.9 miles) • Full Time • 8/26/2025

Details Department: Acute CareSchedule:Monday - Friday 8:00am - 4:30pm. Weekend days on rotationHospital:Ascension St JohnMedical CenterLocation:Tulsa, OKNew Grads Welcome! Mentorship available!Benefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Conduct medically prescribed physical therapy under the supervision of a physical therapis

Tulsa, OK 74104 • (42.9 miles) • Full Time • 8/27/2025

Details Department: Outpatient Orthopedic / SpineSchedule: 7:30 am - 6:00 pm, 4 days per week. Days negotiableHospital: Ascension St. John Broken ArrowLocation: Broken Arrow, OKNew Grads Welcome!Relocation assistance is available!Benefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Evaluate and conduct medically prescribed physical the

Tulsa, OK 74104 • (42.9 miles) • Full Time • 8/27/2025

Details Department: Acute CareSchedule: Monday - Friday 8:30am - 5:00pmHospital: Ascension St. John Medical CenterLocation: Tulsa, OKNew Grads Welcome! Mentorships available.Benefits Paid time off (PTO)Various health insurance options & wellness plansRetirement benefits including employer match plansLong-term & short-term disabilityEmployee assistance programs (EAP)Parental leave & adoption assistanceTuition reimbursementWays to give back to your communityBenefit options and eligibility vary by position. Compensation varies based on factors including, but not limited to, experience, skills, education, performance, location and salary range at the time of the offer.Responsibilities Evaluate and conduct medically prescribed physical therapy treatment programs.Perform initial and on-going ass