Applied Multiphysics Engineer III

Amentum; Tullahoma (TN); On-site; USD 108,000 - 127,000; Full time

Benefits offered by this job

Health insurance

401(k) matching

Paid time off

Educational reimbursement

Parental leave

Employee stock purchase plan

Disability and life insurance

Pet insurance

Job summary

AmentumAdvanced Solutions seeks a mid-level Mechanical Engineer in E&P to tackle challenging design work on hypersonic wind tunnels, rocket test stands, and nuclear facilities. You may serve as the Applied Multiphysics lead on small projects, collaborating with engineers and drafters.

Requirements include a B.S.M.E. from an accredited school and at least seven years of machine design experience, with strong analytical skills in kinematics, dynamics, stress/strain, and GD&T.

Qualifications

• B.S.M.E. from an accredited engineering school.
• Minimum of seven (7) years’ relevant machine design experience.
• Experience with ground test facilities involving extreme conditions.
• Strong analytical skills in kinematics, dynamics, stress/strain, and power transmission.
• Familiarity with GD&T and engineering drawings.

Responsibilities

• Independently performs project assignments with limited scope guided by codes and standards.
• Analyzes results and prepares reports, calculations, and presentations.
• Coordinates work of designers and junior engineers.
• Produces complete design packages with drawings and specifications.
• Supports interface with structural, mechanical, controls, and aerodynamics engineers.

Skills

Ground test facilities design

Kinematics & dynamics analysis

Stress/strain analysis

GD&T/ASTM Y14.5

3D CAD (Inventor/SolidWorks)

Education

B.S.M.E. from accredited school

Tools

FEA - static stress/strain

Ansys (preferred)

Job description

Amentum Advanced Solutions is a performance unit of our Engineering & Technology (E&T) Line of Business. The Amentum Advanced Solutions specializes in the design, construction, and operation of unique and complex research and development facilities, including, as examples, wind tunnels (aerospace, automotive, and motorsports), rocket test stands, climatic chambers, jet engine test cells, acoustic chambers, altitude test facilities, captive trajectory systems, and nuclear facilities. Our projects span the automotive, motorsports, defense, nuclear, and aerospace markets. Recent clients include Audi, Boeing, BMW, Ford, Honda, General Motors, NASA, Stellantis, U.S. Air Force, U.S. Navy, U.S. Department of Energy, Volkswagen, and many others in North America, Europe, and Asia.

A mid-level Mechanical Engineer in E&P would perform work on technically challenging and unique design efforts, such as hypersonic wind tunnels, rocket test stands, aerospace test chambers, nuclear facilities, and scientific facilities. The Engineer may function as the Applied Multiphysics lead on small projects, working with other engineers & designer/drafters.

Duties and Responsibilities:

• Independently performs project assignments that involve few complex features and can be guided by codes, standards, and other precedents of the discipline.
• Analyzes and/or evaluates the results of an analysis using techniques prescribed by senior engineers or supervisors.
• Accomplishes, complete tasks of limited scope or solves problems which require investigation of a limited number of variables.
• Prepares technical reports, presentations, and calculations.
• Coordinates the work of designer/drafters or junior engineers.
• May formally reviews the work of others for techniques and technical approach, if in area of specific technical expertise.
• Supports interface development with other disciplines, working closely with structural, mechanical process, controls and instrumentation, and aerodynamics/fluid dynamics engineers.
• Produces complete design packages, including detailed drawings, calculations, and specifications, as required.

Minimum Experience/Education:

• B.S.M.E. from an accredited engineering school
• Minimum of Seven (7) years’ relevant Machine Design experience (see “Adjacent Industries” below)

Key Skills:

• Demonstrated knowledge and experience with design of ground test facilities involving extremes in temperature, heat transfer, pressure, and mechanical dynamics.
• Strong mechanical engineering analytical skills – kinematics, dynamics, stress/strain, power transmission, etc.
• FEA – static stress‑strain, natural frequency

Preferred Qualifications:

• Design for small‑scale fabrication & manufacturing (milling, turning, welding, laser‑cutting, forming, etc.)
• FEA – thermal, non‑linear, forced mode dynamics and multi‑physics analysis, Ansys preferred
• Design experience with ASME B&PV Section VII, Div I & Div II
• Design for assembly & installation
• Demonstrated experience and expertise in employing GD&T/ASTM Y14.5 in detailed design drawings; understanding of tolerance, fits, and stack‑up analysis
• Scope/Schedule/Budget management
• 3D CAD experience, Inventor or SolidWorks preferred
• Design for fiber‑composites manufacturing (fiberglass, carbon fiber)
• Fluid Power – employing pneumatic/hydraulic cylinders, valve stand design, P&IDs, etc.
• Basic experience with machine instrumentation (proximity sensors, vision sensors, strain gauges, scales, etc.)
• Installation Support and Supervision – guiding and answering suppliers, sub‑contractors and other trades questions from the office and on‑site

Adjacent Industries:

• Aerospace & Defense Mechanical Design
• Machine Design
• Factory Automation (material handling, web handling, process automation, etc.)
• Fluid Power (Hydraulics/Pnumatics)

Compensation Details:

$108,000 - $126,500

The compensation range or hourly rate listed for this position is provided as a good‑faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.

Benefits Overview:

• Health, dental, and vision insurance
• Paid time off and holidays
• Retirement benefits (including 401(k) matching)
• Educational reimbursement
• Parental leave
• Employee stock purchase plan
• Tax‑saving options
• Disability and life insurance
• Pet insurance

Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara‑O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.

Original Posting:

10/05/2026 - Until Filled

Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.

Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters.