Mechanical Engineer - 3MI

Job Description

Job Description

Job Title: Mechanical Engineer - Nuclear Power Design (3MI)
Job Description

This role focuses on delivering high‑quality mechanical engineering solutions for nuclear power plant projects by analyzing complex problems, developing robust designs, and overseeing the full lifecycle of engineering assignments. You will evaluate mechanical and electromechanical systems, provide expert advice on design and construction methods, and ensure that all work meets applicable codes, standards, and nuclear quality requirements. The position requires close collaboration with multidisciplinary teams and station customers to solve challenging technical issues and support safe, reliable, and sustainable energy generation.

Responsibilities

• Analyze complex engineering problems and organize, plan, and control all elements of mechanical engineering projects from concept through completion.
• Provide expert advice on mechanical design processes and construction methods for nuclear power plant systems and components.
• Formulate, lead, and direct investigations, prototype development, model studies, and system studies, and interpret technical data to recommend practical applications and solutions.
• Review and validate complex engineering calculations, design deliverables, and technical documentation to ensure accuracy, completeness, and compliance with applicable codes and standards.
• Analyze and establish performance specifications for mechanical components, equipment, systems, and processes used in nuclear power plants.
• Evaluate mechanical and electromechanical systems and products using principles of mechanics, thermodynamics, hydraulics, heat transfer, and materials science.
• Support and lead the design of mechanical systems for nuclear power plants, including modifications and upgrades at nuclear sites.
• Collaborate closely with team members and other disciplines to determine project priorities, align deliverables, and understand implications of design decisions on the work of others.
• Develop effective engineering solutions and define clear, appropriate deliverables that address client issues and meet project requirements.
• Approve or provide input on work schedules, and make recommendations for additional resources, specialized tools, or equipment needed to meet project objectives.
• Apply working knowledge of nuclear industry codes, standards, regulations, and quality assurance requirements to all design activities.
• Implement and support client Engineering Change Control processes for nuclear power generation utilities.
• Communicate clearly with station customers and stakeholders, building trust through timely updates, technical clarity, and professional conduct.
• Manage time effectively across multiple assignments, ensuring that project milestones, quality expectations, and safety requirements are consistently met.

• Bachelor of Science degree in Mechanical Engineering from an ABET-accredited institution, or a closely related mechanical engineering field.
• At least 4 years of relevant mechanical engineering work experience, including a minimum of 3 years performing mechanical modifications on a nuclear site.
• Demonstrated experience supporting the design of nuclear power plants or nuclear power plant systems.
• Working knowledge of codes, standards, and regulations applicable to mechanical engineering design for nuclear power plants.
• Working knowledge of Nuclear Quality Assurance Standards and their application to design and documentation.
• Familiarity with client Engineering Change Control processes used by nuclear power generation utilities.
• Strong mechanical design skills, including the ability to perform and review complex engineering calculations and design deliverables.
• Ability to apply principles of mechanics, thermodynamics, hydraulics, heat transfer, and materials to evaluate systems and components.
• Excellent written and verbal communication skills for preparing technical documents and interacting with clients and colleagues.
• Strong interpersonal skills with the ability to interface effectively with station customers and multidisciplinary teams.
• Good time management skills with demonstrated capability to prioritize tasks and manage multiple projects.
• Ability and willingness to work onsite as required for nuclear plant projects.

• Experience working within the energy or utility sector, particularly on nuclear power plant projects.
• Knowledge and practical implementation experience with client-specific Engineering Change Control processes for nuclear utilities.
• Exposure to or collaboration with major nuclear and energy organizations is considered an asset.
• Demonstrated ability to gain the trust of station customers through consistent delivery, professionalism, and technical competence.
• Interest in developing a career path that may progress along technical or managerial tracks within a design engineering environment.

This position is based onsite within a leading nuclear engineering environment, supporting structural and mechanical design projects for nuclear power plants. You will work in a highly reputable organization within the nuclear power industry that partners with large energy utilities and major clients on complex, safety-critical projects. The Design Engineering Division provides comprehensive engineering, design, analysis, and consulting services for the energy sector, offering exposure to both traditional nuclear technologies and some of the newest advancements in nuclear power. The work setting emphasizes technical excellence, challenging and meaningful assignments, and an entrepreneurial business culture where you can shape your career along technical or managerial paths. The organization promotes flexible working conditions where possible, while maintaining the onsite presence required for nuclear plant work. You will collaborate with some of the best and brightest professionals in the energy and utility industry, contributing to safe, reliable, zero-emission energy solutions in a professional office and plant environment that follows strict safety, regulatory, and quality standards.

Job Type & Location

This is a Contract to Hire position based out of Middletown, PA.

The pay range for this position is $40.00 - $65.00/hr.

Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following:
• Medical, dental & vision
• Critical Illness, Accident, and Hospital
• 401(k) Retirement Plan – Pre-tax and Roth post-tax contributions available
• Life Insurance (Voluntary Life & AD&D for the employee and dependents)
• Short and long-term disability
• Health Spending Account (HSA)
• Transportation benefits
• Employee Assistance Program
• Time Off/Leave (PTO, Vacation or Sick Leave)

This is a fully onsite position in Middletown,PA.

This position is anticipated to close on Jul 22, 2026.

About Actalent

Actalent is a global leader in engineering and sciences services and talent solutions. We help visionary companies advance their engineering and science initiatives through access to specialized experts who drive scale, innovation and speed to market. With a network of almost 20,000 consultants and 5,000 clients across the U.S., Canada, Asia and Europe, Actalent serves many of the Fortune 500. We are proud to be an Engineering News-Record (ENR) Top 500 Design Firm for our engineering design services and a ClearlyRated Best of Staffing® winner for both client and talent service.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

If you would like to request a reasonable accommodation, such as the modification or adjustment of the job application process or interviewing process due to a disability, please email View email address on ziprecruiter.com for other accommodation options.

San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.