Job Title: Senior / Specialist Mechanical Engineer (E4/E5)
Company: System One
Location: Remote or Onsite (Naperville, IL | Atlanta, GA | Ridgeland, MS)
Position Type: Long-Term Contract

Position Overview
System One is seeking a Senior or Specialist Mechanical Engineer (E4/E5) to support design modification packages for mechanical systems and components in nuclear power plants. This role is part of a growing engineering team focused on delivering high-quality solutions for complex nuclear projects.

The ideal candidate will bring strong technical expertise in mechanical system design, along with the ability to lead projects, review complex calculations, and mentor junior engineers.

Key Responsibilities
Develop and support engineering design modification packages for nuclear plant systems
Perform and review complex calculations and design deliverables
Analyze mechanical and electromechanical systems using principles of:
Mechanics
Thermodynamics
Hydraulics
Heat transfer
Materials science

Establish performance specifications for systems, components, and equipment
Lead investigations, system studies, and technical evaluations
Provide technical leadership and guidance to junior engineers
Serve as technical lead on complex projects or lead small-to-medium projects
Collaborate with multidisciplinary teams to determine priorities and project impacts
Interface directly with clients to define scope, methodology, and deliverables
Support engineering change processes and ensure compliance with nuclear standards
Participate in plant walkdowns, technical discussions, and client presentations

Required Qualifications
Bachelor of Science in Mechanical Engineering from an ABET-accredited program
8–10+ years of relevant mechanical engineering experience

Strong knowledge of:
Mechanical system design in nuclear power plants
Applicable codes, standards, and regulations
Nuclear Quality Assurance standards
Experience supporting engineering change control processes in nuclear environments
Excellent problem-solving, analytical, and technical skills
Strong written and verbal communication skills
Ability to manage multiple priorities and work effectively under pressure
Proven ability to collaborate across teams and build client relationships

Additional Requirements
Ability to travel occasionally for plant walkdowns, client meetings, and presentations
Must be authorized to work in the U.S. without sponsorship

Apply Today
Send your resume to: tricia.colvin-chavous@systemone.com Immediate consideration