Senior Process Mechanical Engineer, Power

Job Description Overview

We are seeking an experienced Senior Process Mechanical Engineer, Power specializing in combined cycle power plant design to join our growing Power engineering team. This role is ideal for a technically strong and highly motivated engineer who thrives in multidisciplinary project environments and is passionate about delivering high‑quality engineering solutions. The preferred location is Bothell, WA with flexibility for hybrid or remote work arrangements.

This position supports engineering execution for new and existing power generation facilities, including simple‑cycle and combined‑cycle plants, and requires strong technical knowledge in thermodynamics, heat transfer, fluid systems, and equipment specification.

• Perform mechanical engineering design for combined cycle and simple cycle power generation systems, including equipment sizing, system modeling, and development of P&IDs.
• Lead and direct the mechanical engineering team assigned to a project to deliver high‑quality power project designs while ensuring effective coordination, technical accuracy, and schedule requirements.
• Collaborate closely with multi‑discipline engineering teams, clients, and external partners to ensure project technical success.
• Prepare calculations, schematics, technical documentation, and design deliverables with clear assumptions and references.
• Develop equipment specifications for pumps, heat exchangers, pressure vessels, compressors, boilers, cooling systems, and balance‑of‑plant components.
• Support proposal development, cost estimation, and project execution planning as needed.
• Coordinate with equipment vendors, review submittals, and respond to technical inquiries.
• Maintain a strong commitment to quality assurance, safety, and compliance with applicable codes and standards (ASME B31.1, ASME BPVC, NFPA, HEI, API, etc.).
• Provide occasional field engineering support, including site visits, inspections, testing oversight, and construction support.

• Bachelor’s degree in mechanical or chemical engineering or related discipline from an ABET‑accredited program.
• Professional Engineer (PE) license preferred.
• Minimum of 10 years of engineering experience, preferably in power generation or industrial facilities.
• Experience in engineering design services and project execution within the energy sector is strongly desirable.
• Experience preparing and checking P&IDs, equipment specifications, and mechanical design deliverables.
• Experience or desire to work with design tools such as AFT Fathom, AFT Arrow, GT Pro, Steam Pro, and Thermoflex.
• Strong understanding of thermodynamics, heat transfer, and fluid flow with specific experience in combined cycle plant performance, HRSG systems, steam turbine cycles, and gas turbine auxiliary systems.
• Ability to clearly communicate complex technical concepts to colleagues, suppliers, and clients.
• Flexibility to manage workload across multiple projects while upholding safety and quality standards.
• Proficiency in pipe sizing, flow calculations, and modelling of compressible/in compressible systems.
• Familiarity with piping materials, valves, control valves, and relief valve design.
• Commitment to mentoring, team collaboration, and maintaining strong professional relationships.

At Atkins

Réalis, our values—Safety, Integrity, Collaboration, Innovation, and Excellence—are more than just words. They are the foundation of who we are and how we work. These principles shape our culture, guide our decisions, and inspire us to create an environment where every team member feels empowered to grow, succeed, and make a meaningful impact.

Depending on your employment status, Atkins

Réalis benefits may include medical, dental, vision, company‑paid life and short‑ and long‑term disability benefits, employer‑matched 401(k) with 100% vesting, employee stock purchase plan, Paid Time Off, leaves of absences options, flexible work options, recognition and employee satisfaction programs, employee assistance program, and voluntary benefits. You can review our comprehensive benefits page here.

We’re Atkins

Réalis, a world‑class engineering services and nuclear…