12 senior mechanical engineer jobs at 7 companies in Ammon, ID
1d
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Mechanical Engineer
Idaho Falls, Idaho, United States
$95k-$234k/yr OnsiteFull Time
5+ YOEBachelor's in engineering or related field plus 5–9 years of experience depending on level; master's or PhD alternatives accepted. Requires U.S. citizenship for DOE Q clearance eligibility and an ABET-accredited advanced degree preferred.
2w
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Mechanical Design Engineer - Fuel Manufacturing
Idaho Falls, Idaho, United States
$100k-$150k/yr RemoteFull Time
5+ YOEBachelor's in Mechanical Engineering,5+ years mechanical design experience,proficiency in 3D CAD (SolidWorks),PDM/PLM experience,GD&T/ASME drawing skills,DFM/DFA and material/manufacturing knowledge.
SolidWorks, SolidWorks PDM, Teamcenter, Windchill, ANSYS, Python
1w
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Mechanical Design & Reliability Engineering Manager
Idaho Falls, Idaho, United States
$108k-$275k/yr OnsiteFull Time
5+ YOE2+ MgmtBachelor's degree in mechanical engineering, 5+ years of DOE contractor experience, 2+ years of leadership experience managing at least 10 direct reports, and experience with nuclear projects, EVMS, FIMS, and Design Authority duties.
Earned Value Management System (EVMS), Facility Information Management System (FIMS)
2mo
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Chief Engineer
Oak Ridge or Idaho Falls
OnsiteFull Time
16+ YOEBachelor's in civil/mechanical/electrical engineering plus active professional engineering certification, 15+ years nuclear industry experience, team leadership, project management knowledge, US citizenship, drug screening, and clearance eligibility.
Earned Value Management
3mo
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Thermal Hydraulics Engineer
Idaho Falls or Austin
$110k/yr OnsiteFull Time
5+ YOEMSc in nuclear or mechanical engineering, 5+ years CFD experience, expertise with CFD platforms, strong numerical methods, and ability to perform thermal-fluid analyses; US-based and onsite in Idaho Falls.
STAR-CCM+, COMSOL, Altair, Nek5000, OpenFOAM
3mo
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Test Engineer III (Camden, NJ, US)
Camden or Idaho Falls
$120k-$140k/yr OnsiteFull Time
6+ YOEB.S. in Mechanical, Nuclear, Chemical Engineering, 6-10 years of related testing experience, test program planning and documentation, QA/regulatory exposure, data analysis, strong communication.
Python, MATLAB, LabVIEW, Data Acquisition Systems, Test instrumentation, ASME standards, NQA-1
2mo
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Instrumentation and Controls Engineer
Idaho Falls, Idaho, United States
$95k-$234k/yr OnsiteFull Time
5+ YOEABET-accredited BS in Electrical or Mechanical Engineering; Level 3: BS+5 yrs or MS+2 yrs; Level 4: BS+9 yrs or MS+6 yrs; relevant hands-on electrical/mechanical/I&C experience; PE preferred; US citizenship and ability to obtain DOE L clearance may be required.
1mo
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Mechanical Engineering – Full-time Faculty – Anticipated Fall 2027
Rexburg, Idaho, United States
OnsiteFull Time
Master's or doctorate in Mechanical Engineering or related field required; professional or industry experience; ability to teach foundational and upper-division courses; obtain P.E. within three years; commitment to teaching and scholarly development.
CAD, Programming
1mo
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Senior/Principal Finite Element Analyst - Thermomechanical & Structural Mechanics
Idaho Falls or Austin
OnsiteFull Time
10+ YOEBachelor's in engineering, 10+ years FEA experience in high-consequence industries, deep thermomechanics/structural mechanics knowledge, NASTRAN and commercial solver experience, ability to produce nuclear-quality documentation and mentor engineers.
NASTRAN, Abaqus, ANSYS Mechanical, LS-DYNA, COMSOL, Femap, HyperMesh, Simcenter 3D, Python, MATLAB
1mo
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Senior/Principal Finite Element Analyst - Thermomechanical & Structural Mechanics
Austin or Idaho Falls
OnsiteFull Time
10+ YOEBachelor's in engineering, 10+ years FEA experience (nuclear/aerospace/energy), deep structural/thermomechanics knowledge, strong NASTRAN experience, ASME Section III familiarity, ability to produce nuclear-quality documentation, must be U.S. based/eligible under 10 CFR Part 810.
NASTRAN, Abaqus, ANSYS Mechanical, LS-DYNA, COMSOL, Femap, HyperMesh, Simcenter 3D, Python, MATLAB
2w
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Engineering Intern Fall 2026
Idaho Falls, Idaho, United States
$17-$20/hr OnsitePart Time
Current undergraduate engineering student (junior/senior preferred). Must be eligible as a U.S. person for federally funded programs, pass background check and drug test, and be able to commute to Idaho Falls. Strong attention to detail and basic lab/mechanical experience preferred.
SolidWorks, Python, MATLAB, Microsoft Excel, SEM, Instron
4d
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Principal Nuclear Safety Analyst
Idaho Falls, Idaho, United States
RemoteFull Time
15+ YOEB.S. or M.S. in Nuclear or Mechanical Engineering; 15–20 years in the nuclear industry; safety analysis or reactor design experience; RELAP5-3D or TRACE experience; NRC licensing knowledge; security clearance eligibility.
RELAP5-3D, TRACE, VIPRE-01, MCNP, SCALE, PARCS, FAST, RADTRAD, Mathcad, Octave, Python, Java, CAD, CFD