Mechanical Designer 3 (SmartPlant) - Nuclear

Sargent Lundy; Chattanooga (TN); Hybrid; USD 68,000 - 104,000; Full time

Benefits offered by this job

Health plan

Life insurance

Disability coverage

401(k)

Paid time off

Tuition assistance

Job summary

Sargent & Lundy is seeking an experienced Mechanical Designer to develop mechanical general arrangement, piping isometrics, pipe supports, and equipment layout drawings in a 3‑D model. The role involves leading design activities and coordinating with multi‑disciplinary teams.

The position is hybrid, requiring in‑office work several days per week, with emphasis on resolving clashes, mentoring less experienced drafters, and delivering complete, compliant design packages for complex projects.

Qualifications

• 8+ years of detailed design experience in mechanical plant design drawings (piping, pipe supports, equipment layout).
• Experience with 3D plant layout models using design software tools.
• Experience reviewing project deliverables and vendor drawings; interfacing with engineering teams.

Responsibilities

• Develop mechanical general arrangement, piping isometrics, pipe supports, and equipment layouts in 3D.
• Lead mechanical design coordination across disciplines and resolve clashes.
• Mentor junior drafters and designers; provide guidance to the team.
• Coordinate with designers/project team to ensure timely, complete design deliverables.

Skills

SmartPlant S3D modeling

Clash detection

3D plant layout modeling

Vendor drawing reviews

Interdisciplinary collaboration

Mentoring junior staff

SPID and SPF integration

Project deliverables review

Tools

SmartPlant S3D

MicroStation

AutoCAD

Job description

• Under the direction of the Mechanical Project Lead, this position will offer you the opportunity to work with multi-disciplined engineering and design project teams in developing mechanical general arrangement, piping isometric, pipe support, and mechanical equipment layout drawings in a 3‑D model
• Utilize Hexagon’s SmartPlant S3D modeling software and SPF database to generate mechanical design deliverables, BOMs, and commodity lists
• Understand and interpret piping & instrumentation diagrams developed using SPID and create physical design consistent with the engineering requirements
• Act as the mechanical design team lead in the coordination of detailed design phases for all aspects of an integrated mechanical design model
• Resolve clashes and discrepancies in the 3D model and report status
• Coordinate and provide guidance to other designers and project team members to ensure a complete and timely design
• Independently plan and execute design of mechanical deliverables
• Provide guidance as a mentor in the development of less experienced drafters and designers

• Under the direction of the Mechanical Project Lead, this position will offer you the opportunity to work with multi-disciplined engineering and design project teams in developing mechanical general arrangement, piping isometric, pipe support, and mechanical equipment layout drawings in a 3‑D model
• Utilize Hexagon’s SmartPlant S3D modeling software and SPF database to generate mechanical design deliverables, BOMs, and commodity lists
• Understand and interpret piping & instrumentation diagrams developed using SPID and create physical design consistent with the engineering requirements
• Act as the mechanical design team lead in the coordination of detailed design phases for all aspects of an integrated mechanical design model
• Resolve clashes and discrepancies in the 3D model and report status
• Coordinate and provide guidance to other designers and project team members to ensure a complete and timely design
• Independently plan and execute design of mechanical deliverables
• Provide guidance as a mentor in the development of less experienced drafters and designers

This position is based on a hybrid work schedule and will require in‑office work 3 days per week.

Qualifications

We do not sponsor employees for work authorization in the U.S. for this position.

Essential Skills And Experience

• Experience with SmartPlant S3D modeling software including the following:
• Understanding of the integration aspects of SPID, SPF and S3D
• Clash detection resolution
• Discrepancy checks between deliverables
• Interface with SmartPlant Administrators in the development of mechanical deliverable templates and catalogs
• Drawing Presentation Rules Set Up
• Plant model data management
• 8 or more years of detailed design experience in the development of mechanical plant design drawings; piping, pipe supports and equipment layout
• Proficiency with design software tools in executing 3D plant layout models
• Experience in the review of project deliverables and drawing requirements
• Experience in the review of vendor drawings and interface points
• Ability to interface with engineering and design teams of other disciplines in the plant design process.

Valued But Not Required Experience

• Proficiency with MicroStation and AutoCAD
• Microsoft Office tools

Technology & Innovation

Sargent & Lundy values the appropriate use of technology to improve how work gets done and deliver high‑quality outcomes for our clients. Depending on the role, employees may use data, automation, artificial intelligence, and other digital tools to support research, analysis, engineering and design activities, workflow improvement, or other aspects of their work.

We value candidates who demonstrate an interest in learning and effectively using emerging technologies where relevant to their role. Employees remain accountable for their work and are expected to apply appropriate professional judgement and review when using technology‑assisted tools.

Experience with AI, automation, programming, or similar technologies is valued where relevant but is not required unless specifically identified elsewhere in the job description.

About Sargent & Lundy

At Sargent & Lundy, we care about the health and well‑being of our employees.

• Health Plans: Medical, Dental, Vision
• Life & Accident Insurance
• Disability Coverage
• Employee Assistance Program (EAP)
• Back‑Up Daycare
• FSA & HSA
• 401(k)
• Pre‑Tax Commuter Account
• Merit Scholarship Program
• Employee Discount Program
• Corporate Charitable Giving Program
• Tuition Assistance
• First Professional Licensure Bonus
• Employee Referral Bonus
• Paid Annual Personal/Sick Time (PST)
• Paid Vacation
• Paid Holidays
• Paid Parental Leave
• Paid Bereavement Leave
• Flexible Work Arrangements

Compensation Range

$68,325 - $104,385

Transparency Statement

Sargent & Lundy discloses compensation ranges that comply with all local and state regulations. The total compensation package for eligible positions will include a base salary or an hourly rate and a comprehensive benefits package, reflecting our commitment to rewarding performance and supporting the overall well‑being of our employees. Individuals may also be eligible to participate in our yearly discretionary bonus.

About This Business Unit

Join Sargent & Lundy's Nuclear Power Group and be part of a team driving the future of clean, carbon‑free energy. Since 1954, we’ve been a trusted leader in nuclear engineering, design, and licensing, with expertise spanning small modular reactors (SMRs), advanced reactor technology (ART), and first‑of‑a‑kind commercial reactor restart projects. Our work supports life extensions and digital modernization of existing nuclear plants, coal‑to‑nuclear conversion initiatives with the Department of State, and international nuclear new‑build projects. With a commitment to safety, innovation, and sustainability, we provide cutting‑edge solutions that power communities worldwide while reducing emissions. Shape the future of global energy with us!

Equal Opportunity

Sargent & Lundy is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, national origin, disability status, protected veteran status, or any protected status as defined by applicable law.