Demo

Mechanical Design Engineer Senior Specialist

Pantex Plant
Amarillo, TX Full Time
POSTED ON 1/1/2026
AVAILABLE BEFORE 2/7/2026
Location: Pantex Plant, Amarillo, TX

Job Title: Mechanical Design Engineer Senior Specialist

Career Level: Senior Specialist

Organization: Projects Engineering (50996614)

Job Specialty: Core Engineering

What You'll Do

As a design engineer, the candidate will be responsible for developing high quality detailed design packages, providing engineering procurement and field technical support to implement those designs, and providing expertise for troubleshooting and technical assessments of plant systems. In this senior role, the candidate will also be responsible for mentoring early career engineers and providing reviews and input into their designs. Design involves the preparation of conceptual engineering deliverables such as cost-estimating bills of material and man-hour estimates, statements of work, design criteria, and title II engineering deliverables including preparation of calculations and analyses, construction specifications & drawings, and equipment specifications. Candidate must effectively and cooperatively work as a team member of an integrated project team, or as a technical lead for a multi-discipline task and will routinely provide input to system engineers and other plant customers. Design engineers routinely perform walkdowns in the existing plant facilities in order to generate design documents and provide field support to craft personnel.

The mechanical piping/heating, ventilation, and air conditioning (HVAC) engineer shall be responsible for interpreting, organizing, and executing assignments and engineering design for process piping, utility piping systems, high efficiency particulate air (HEPA) filtration, exhaust systems, dehumidification, and air conditioning in support of nuclear and non-nuclear projects at Pantex. A strong candidate for the piping/HVAC Engineer position should have experience with design in systems such as potable water and fire-protection supply systems, gases, acid and caustic fluids, brines, cryogenics, steam and condensate, hot and chilled water systems, chillers, boilers, cooling towers, and vacuum systems as well as design of duct systems, ventilation/exhaust systems, and the basic installation of mechanical HVAC equipment. Additional experience in performing computer hydraulic (steady-state and transient) analysis, computer pipe stress analysis, and support selection/design is desired.

What You Can Expect

  • Meaningful work and unique opportunities to support missions vital to national and global security
  • Top-notch, dedicated colleagues
  • Generous pay and benefits with a stable organization
  • Career advancement and professional development programs
  • Work-life balance fostered through flexible work options and wellness initiatives

Minimum Job Requirements

  • Bachelor of Science in mechanical engineering with a minimum 3.0/4.0 cumulative grade point average (GPA) from an Engineering Accreditation Commission (EAC) Accreditation Board for Engineering and Technology (ABET) accredited program in the United States or designated equivalents from Canada or Mexico, the Washington Accord, or the list of substantially equivalent as documented by ABET with a minimum of 7 years relevant experience
  • OR a Master's degree in mechanical engineering with a minimum 3.3/4.0 cumulative GPA and at least 5 years relevant experience
  • OR a PhD in mechanical engineering with a minimum 3.5/4.0 cumulative GPA and at least 2 years of relevant experience
  • There is a minimum GPA requirement up to 4 years post-graduation at time of offer and confirmed by transcript
    • Beyond four years from graduation, engineering experience will supersede GPA as a requirement for hire
Department of Energy (DOE) Order 426.2A Requirements

  • In addition, the applicant must meet the requirements of DOE O 426.2 (i.e., Baccalaureate in engineering or related science, 2 years job-related and at least 1 year nuclear experience, or a DOE O 426.2 alternative). DOE 426.2 experience requirements can be satisfied following employment. In the interim, newly hired personnel will not be assigned duties that could impact the safety basis of nuclear facilities. (Ref. DOE O 426.2)

Preferred Job Requirements

  • A Professional Engineering License (PE)
  • Knowledgeable in respective technical standards, principles, theories, concepts, and techniques
  • Demonstrated technical capabilities, leadership, and work ethic
  • Ability to work in a project team environment and communicate well with other disciplines, customers, and stakeholders
  • Ability to follow procedures and work within a rigorous work process
  • Ability to estimate, plan, and track progress for preparation of discipline deliverables
  • Good written and oral communications skills
  • Capable of handling classified information

Why Pantex?

You get #morethanajob. We encourage employees to achieve a healthy personal balance among home, work and the community. One of the ways we embrace work-life balance is by offering flexible work arrangements that provide alternatives to the traditional workweek, while still meeting business needs. Top talent and personal commitment mean more to our success than any other factors, so we reward our people with the kinds of benefits that make a positive difference in the quality of their lives. Benefits such as: medical plan, prescription drug plan, vision plan, dental plan, employer matched 401(k) savings plan, disability coverage, education reimbursement and many more. Want to stay healthy and fit but hate the cost of a gym membership? Take advantage of one of our onsite workout facilities and eat healthy in our onsite cafeterias. Much more than a workplace, at Pantex you can build a career that lasts a lifetime.

Notes

The minimum education and experience for the lowest career level in the job posting range are listed under Minimum Job Requirements. Successful candidates hired into a higher career level than the minimum in the range must meet the requirements listed in the job leveling charts for the career level into which they are being hired.

If a range of Career Levels is posted, i.e., Senior Associate to Senior Specialist, internal applicants already in one of the Career Levels would come across at their current Career Level. Internal applicants currently in a lower level Career Level would move to the lowest posted Career Level.

Requires a Q clearance; however all qualified candidates will be considered regardless of their current clearance status. The ability to obtain and maintain a Department of Energy Q clearance is required.

Position may require entry into Materials Access Areas (MAA) and participation in the Human Reliability Program (HRP). If HRP is required, candidate must complete a counterintelligence-scope polygraph, pursuant to 10CFR 709. Medical requirements may apply.

Pantex is a drug-free workplace. Candidates accepting a job offer will be required to pass a pre-placement physical, drug screening and background investigation. As an employee, you may be required to receive and maintain a security clearance from the United States Department of Energy in order to meet eligibility requirements for access to sensitive information or matter. U.S. citizenship is a requirement for security clearance applicants. All employees are subject to being randomly selected for drug testing without advance notification.

Pantex is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, sex, age, religion, national origin, ancestry, genetic information, disability or veteran status.

Salary.com Estimation for Mechanical Design Engineer Senior Specialist in Amarillo, TX
$84,805 to $100,503
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