Richland, WA 99354 • (39 miles) • Full Time • 10/5/2026

Principal Mechanical Engineer Location: Richland, WA Company: Columbia Energy & Environmental Services Salary: $120,000 – $180,000 DOE About Columbia Energy Columbia Energy & Environmental Services, headquartered in Richland, WA, is a well-established small business with a strong track record of delivering comprehensive solutions in engineering, design, fabrication, instrumentation and controls, and other specialized services. With expertise in fixed-price design/build/test projects, we serve both federal and commercial clients, consistently delivering high-quality results through innovation and technical precision. Our collaborative and experienced team is committed to providing practical, client-focused solutions tailored to address a wide range of challenges. Recently, we expanded our o

Richland, WA 99354 • (39 miles) • Full Time • 10/15/2026

Job Title: Mechanical Engineer Location: Richland, Washington Type: Contract Contractor Work Model: Onsite – onsite Hours: 40.0 Overview Responsibilities Create, modify, and update 2D drawings and 3D models using AutoCAD and SolidWorks Assist in mechanical design activities including part design, assembly modeling, and basic engineering calculations Prepare detailed engineering drawings, bills of materials (BOMs), and supporting documentation Vault, manage, and maintain drawings and models within a Product Data Management system (e.g., PDM, Vault, or similar) Support engineering reviews, design changes, and configuration control processes Collaborate with senior engineers, project managers, and manufacturing teams to ensure design accuracy and project alignment Contribute to continuous imp

Richland, WA 99352 • (34.1 miles) • Full Time • $26.00 / hr • 10/15/2026

At Core States Group, the work you do matters to the clients we serve, the communities we support, and the teams who rely on one another to deliver with excellence. Our Cause is powerful: to create a world where all environments improve everyday life. Why Professionals Choose Core States Group Here’s what you can expect as an intern: VALUES-DRIVEN CULTURE – A workplace rooted in Integrity, Service, Inclusion, Excellence, and Innovation. Our Core Values guide how we work, how we treat each other, and how we show up for our clients every day. PERKS – Intern Welcome Package with branded swag, team-building activities, networking opportunities, group sessions with industry leaders, wellness initiatives and volunteer activities and much more! RETIREMENT – A strong 401(k) match, with immediate v

Richland, WA 99352 • (34.1 miles) • Full Time • $100,000 to $150,000 / yr • 10/5/2026

At Core States Group, the work you do matters to the clients we serve, the communities we support, and the teams who rely on one another to deliver with excellence. Our Cause is powerful: to create a world where all environments improve everyday life. Why Professionals Choose Core States Group Here's what you can expect: COMPENSATION – Competitive wages and bonus programs RETIREMENT – We offer a great 401(k) match to help you invest in your future and grow your retirement savings with confidence. HEALTHCARE – Excellent health benefits, life insurance options, and supplemental benefit options, giving you the flexibility to choose the coverage that best fits your needs and lifestyle. VACATION – Generous PTO time to help you recharge, relax, and maintain a healthy work-life balance. PERKS – T