Piping Principal Designer; Nuclear

Overview

U.S. Citizen. Johnson Service Group (JSG) is working with a client that is expanding its footprint in the nuclear and energy sectors, supporting some of the most complex, high-impact projects across the U.S. This is more than a role — it’s a chance to be part of a collaborative team that’s helping shape the energy transition and delivering solutions for industries that matter.

Pay: $150-$160K (DOE)

Location: Greenville, SC (100% on site)

Must be a U.S. Citizen.

Johnson Service Group (JSG) is working with a client that is expanding its footprint in the nuclear and energy sectors, supporting some of the most complex, high-impact projects across the U.S. This is more than a role — it’s a chance to be part of a collaborative team that’s helping shape the energy transition and delivering solutions for industries that matter.

Why should you consider this opportunity?

• Be part of a trusted engineering and technical staffing leader with a strong reputation in nuclear and energy innovation.
• Work on challenging, meaningful projects that directly impact the future of clean energy and energy security.
• Grow your career in a supportive, nationwide team where your expertise is valued, and your development is prioritized.
• Strong overall company benefits, including 401(K) with up to 6% employer contribution and a real emphasis on work-life balance and vacation time.
• They focus on employee development and long-term retention, making sure that their employees are happy.

We are seeking an experienced Piping Principal Designer to lead complex piping design efforts in support of nuclear and DOE-regulated projects. This role requires deep technical expertise, the ability to work independently with minimal supervision, and experience supporting safety-critical facilities and systems.

The ideal candidate has a strong background in nuclear piping design, DOE codes and standards, and 3D modeling, and is comfortable serving as a technical lead and mentor within a multidisciplinary engineering environment.

• Provide technical leadership for piping design activities with minimal direction
• Lead and/or supervise junior and intermediate designers
• Prepare and check piping design deliverables including:
• Piping layouts and drawings
• 3D models and isometrics
• Piping plans, sections, and details
• Execute work in compliance with project quality requirements, procedures, and client standards
• Coordinate with engineering disciplines, procurement, vendors, and subcontractors
• Support construction activities, field changes, and as-built documentation
• Perform walkdowns and field verification as needed
• Ensure designs meet applicable codes, standards, and DOE requirements
• Support administrative and technical documentation related to design changes and project execution

• U.S. Citizenship required
• Associate degree in a related technical field or a minimum of 15 years of relevant experience
• Working knowledge of applicable piping codes and standards, including DOE Orders
• Experience supporting nuclear or DOE-regulated facilities
• Strong background in:
• Piping design and layout
• 3D modeling and 2D CADD
• Design verification and checking
• Ability to read and interpret engineering drawings, specifications, and technical documentation
• Experience working in a multi-disciplinary engineering and construction environment
• Excellent communication and coordination skills

• Experience with ASME NQA-1 quality requirements

• Department of Energy (DOE)
• Nuclear facilities or safety-related systems
• Knowledge of material availability, procurement, and vendor documentation

• P&IDs and piping line lists
• Piping stress requirements
• Construction and field execution support
• Previous experience serving as a lead or principal designer on large, complex projects

Johnson Service Group (JSG) is an Equal Opportunity Employer. JSG provides equal employment opportunities to all applicants and employees without regard to race, color, religion, sex, age, sexual orientation, gender identity, national origin, disability, marital status, protected veteran status, or any other characteristic protected by law.