Senior R&D Mechanical Engineer Jobs in Tennessee

Merrick is seeking a Senior Mechanical Engineer to join our Energy, Manufacturing & Bioprocessing Business Unit. This full-time, direct hire position, will be responsible for engineering, design, coordination, client communications and associated construction administration.

This position can be located in any of the following offices: Greenwood Village, CO; Tulsa, OK; Chattanooga, TN; Richmond, VA; Newport News, VA; Ellicott City, MD. A hybrid work schedule will be supported, and fully remote candidates may be considered.

As a Senior Mechanical Engineer on our Energy, Manufacturing & Bioprocessing team, you will play a key role in delivering complex engineering projects within a dynamic, multi-disciplinary environment. This position is responsible for overseeing mechanical engineering deliverables, performing engineering calculations, selecting systems and equipment, and developing mechanical designs. You will also manage project budgets and schedules, maintain strong relationships with clients, vendors, and internal stakeholders, and collaborate closely with engineering and technical teams to ensure successful project execution and achievement of overall project objectives. In this role you will:

• Lead mechanical engineering design for bioprocessing, oil & gas, chemical, power, and industrial facility projects.
• Develop basis of design documents and ensure compliance with client requirements, industry standards, and applicable codes (IBC, ASME, API, PIP, NFPA, etc.).
• Prepare scopes of work, support proposals, and collaborate with clients to evaluate costs and identify value engineering opportunities.
• Interpret project requirements and oversee all aspects of mechanical design, including equipment, piping, and system selection.
• Perform and review engineering calculations, equipment sizing, and code-compliant system designs.
• Direct piping design activities, including 3D modeling, pipe stress analysis, P&IDs, piping plans, specifications, and isometrics.
• Ensure adherence to quality assurance procedures and technical excellence throughout project execution.
• Prepare and review construction documents, specifications, equipment datasheets, and engineering deliverables.
• Provide construction-phase support by resolving field issues, responding to RFIs, and conducting site inspections as needed.
• Manage mechanical engineering budgets, schedules, and scope while supporting successful project delivery and profitability.
• Collaborate with project managers, engineers, designers, clients, and contractors to achieve project objectives.
• Mentor and develop junior engineers and designers.
• Maintain professional licensure requirements and pursue ongoing technical and professional development.

• Bachelor’s degree in mechanical engineering from ABET accredited program required.
• 12+ years industry experience.
• Registered Professional Engineer or ability to obtain your PE within the first year of employment.
• Experience with Design/Build and EPC projects.
• Significant pipe stress analysis experience utilizing software such as CAESAR II.
• Experience leading teams of engineers on design projects.
• Must have a valid driver's license, a good driving record, and be insurable under Merrick’s insurance carrier.
• Must be eligible to work in the United States without sponsorship.

• Significant experience with oil and gas, petrochemical, bioprocessing or power facility design.
• Extensive design experience in piping engineering, pipe supports, equipment layouts and detailed piping design.
• Knowledge of ASME B31.3 and B31.1, ASME Boiler & Pressure Vessel codes, PIP and API codes.
• Experience in managing personnel and project engineering.

• 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.

• Travel to project sites and equipment fabricator shop locations.
• Walking down plant systems and equipment, which includes climbing ladders and stairs.

• 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.

• Bachelor’s degree in mechanical engineering from ABET accredited program required.
• 12+ years industry experience.
• Registered Professional Engineer or ability to obtain your PE within the first year of employment.
• Experience with Design/Build and EPC projects.
• Significant pipe stress analysis experience utilizing software such as CAESAR II.
• Experience leading teams of engineers on design projects.
• Must have a valid driver's license, a good driving record, and be insurable under Merrick’s insurance carrier.
• Must be eligible to work in the United States without sponsorship.