Senior Modeling Simulation Engineer Jobs in Tennessee

Merrick & Company is looking for an experienced/senior Process Engineer to join our team in Oak Ridge, TN. We’re seeking candidates who are passionate about nuclear design, enjoy working on a multidisciplinary team, and appreciate the Knoxville, TN area. 

In this role, you will primarily focus on innovative nuclear and energy projects. Successful candidates will collaborate with a diverse team of engineers and designers to deliver high-quality design and engineering solutions.

In-office/WFH hybrid schedules are offered.

• Independently evaluate and solve complex problems with limited guidance from senior staff.                                                                                             
• Work with other disciplines to improve accuracy of the deliverables, schedule, and budget commitments.                                                    
• Prepares or oversees process design deliverables including:
  • Process Flow Diagrams
  • Piping and Instrumentation Diagrams
  • Equipment sizing calculations
  • Process line sizing calculations
  • Pressure relief device sizing calculations
  • Mass & energy balances / process simulations
  • Equipment and Instrument datasheets
  • Piping/equipment specifications
• Interpret customer requirements or code/standard requirements to establish design criteria.
• Lead or actively contribute to client meetings and technical discussions and develop strong client relationships.
• Support business development efforts through preparation of technical scopes and proposal estimates.
• Provide in-depth and comprehensive technical peer reviews on design documents in a timely manner.
• Technical work/documents are mostly error free and demonstrate self-checking of work before submitting documents for peer review.
• Be accountable for the technical quality and completeness of process design deliverables.
• Lead process design efforts on projects and coordinate with multidisciplinary teams.
• Determines feasibility of designing new plant equipment or modifying existing facilities considering costs, available space, time limitations, company planning and other technical and economic factors. 
• Able to perform almost all process design tasks independently.
• Leading a team of more junior engineers and designers on projects.
• Act as a formal supervisor and mentor to more junior engineers.
• Work effectively in a multidisciplinary design team environment.
• Stamp design documents as a Professional Engineer (PE), as applicable.

• Bachelor’s degree in engineering from A.B.E.T accredited program required.                                   
• Professional Engineer (P.E.) License required, or ability to obtain it within 12 months of hire.
• 8+ years of related engineering experience required.
• Process Lead experience includes supervising, leading, managing and mentoring a team of electrical engineers and designers on concurrent projects.
• Experience using ChemCad/Aspen/HYSYS (or similar) process simulator and AFT Fathom, AFT Arrow (or similar) for hydraulic pipe flow modeling preferred.
• Exhibits generally sound technical knowledge to produce design deliverables with minimal guidance from senior engineers. 
• Acquires general knowledge of principles and practices of related fields and ability to function on multi-disciplinary teams.
• Working knowledge of industry codes and standards.
• Ability to apply reasoning with minimal supervision.
• Possesses effective oral and written communication skills with both teammates and clients.
• Assists with client, vendors or official contacts and communication pertaining to specific assignments or meetings.
• Display ability to review technical design documents/packages and be able to identify issues/pitfalls and actively propose solutions.
• Act as peer reviewer to design documents authored by junior engineers and provide quality engineering reviews.
• Client projects for this position require US Citizenship

• Employee Ownership – All eligible U.S. employees participate in our Employee Stock Ownership Plan (ESOP), sharing in the company’s success.
• Comprehensive Compensation & Benefits – Merrick & Company offers a competitive compensation and benefits package including health insurance, dental and vision coverage, and paid time off (PTO).
• Robust Referral Program – Earn incentives for referring top talent to join our team.
• Performance Reviews – Annual reviews to recognize contributions and support career growth.
• Professional Development – Access to ongoing training and development opportunities to build your skills and advance your career.
• Employee Recognition – Formal programs to celebrate achievements and outstanding performance.
• Peer Mentor Program – Get support and guidance through structured mentorship opportunities.
• And More – Additional programs and benefits designed to support your success and well-being.

• Apply online only. No e-mail, hard copy or third-party resumes accepted.
• At Merrick, every resume is carefully reviewed by our team of experienced human recruiters—never by AI. We are committed to a fully human-centered hiring process, ensuring each candidate receives thoughtful, personalized attention at every stage.
• Merrick is an Equal Opportunity Employer, including disability/vets.
• Employment with Merrick is contingent upon completion of a pre-employment background check, MVR check, and drug screen.

#LI-Hybrid

• Bachelor’s degree in engineering from A.B.E.T accredited program required.                                   
• Professional Engineer (P.E.) License required, or ability to obtain it within 12 months of hire.
• 8+ years of related engineering experience required.
• Process Lead experience includes supervising, leading, managing and mentoring a team of electrical engineers and designers on concurrent projects.
• Experience using ChemCad/Aspen/HYSYS (or similar) process simulator and AFT Fathom, AFT Arrow (or similar) for hydraulic pipe flow modeling preferred.
• Exhibits generally sound technical knowledge to produce design deliverables with minimal guidance from senior engineers. 
• Acquires general knowledge of principles and practices of related fields and ability to function on multi-disciplinary teams.
• Working knowledge of industry codes and standards.
• Ability to apply reasoning with minimal supervision.
• Possesses effective oral and written communication skills with both teammates and clients.
• Assists with client, vendors or official contacts and communication pertaining to specific assignments or meetings.
• Display ability to review technical design documents/packages and be able to identify issues/pitfalls and actively propose solutions.
• Act as peer reviewer to design documents authored by junior engineers and provide quality engineering reviews.
• Client projects for this position require US Citizenship