Principal Engineer/ Mechanical Engineering Manager (Heat Exchanger Design)

Join an industry-leading team shaping the next generation of safe, clean, and innovative nuclear technology. We’re seeking a Principal Engineer to lead the design and development of heat exchangers and steam generators for a revolutionary small modular reactor. If you’re passionate about high-impact engineering and want to mentor top talent while solving complex mechanical challenges, this is the role for you.

What this role offers:

Location: Rockville, MD (530 Gaither Road)
Full-Time, Onsite, 12-Month Contract
Work Site Expectations: 4 days onsite per week
Salary Range: $120/hr
Healthcare Benefits: Medical, Dental, Vision
PTO & Paid Holidays
Unmatched 401k

Key Responsibilities:

• Lead a team of engineers in the design and development of steam generators and heat exchangers for advanced nuclear applications.
• Manage resource allocation, technical direction, and execution of design projects from concept to production.
• Oversee engineering work for nuclear reactor components with a focus on manufacturability and performance.
• Provide mentorship and career development for junior engineers.
• Guide application of ASME codes, thermal-hydraulic analysis, and structural evaluation.
• Lead sprint cycles and resolve cross-functional technical challenges.
• Coordinate with multidisciplinary teams, external partners, and suppliers to deliver quality design outputs.
• Establish and implement design principles and best practices.
• Maintain compliance with design control procedures and documentation standards.

Qualifications:

• Bachelor’s degree in Mechanical Engineering or related field.
• Minimum 10 years of engineering experience (graduate degrees may count for up to 2 years).
• Proficiency in at least one of the following: mechanical/fluid system design, hardware testing oversight, CAD/PLM tools (UG/NX, SolidWorks, Pro-Engineer, Teamcenter, Windchill).
• 8+ years of mechanical design experience, with 4+ years specifically in heat exchanger or steam generator design preferred.
• Experience applying ASME Boiler and Pressure Vessel Code.
• Background in material selection for high-temp/pressure, structural analysis, and failure analysis.
• Familiarity with manufacturing processes such as welding, machining, and DFM.
• PE license strongly preferred.

Thomas-Thor provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws.

Katherine Hulse