Senior Mechanical Engineers salary in Illinois
Roles that require seasoned judgement and the ability to lead projects without supervision. Typically five to ten years of experience and a track record of complete ownership.
Senior Mechanical Engineers in Illinois: actual employer-disclosed pay
Public records from 80 certified H-1B Labor Condition Applications filed with the U.S. Department of Labor. Median offered wage: $116,235. Every figure below is an actual offered salary an employer attested to under federal law.
By DOL wage level
DOL classifies every offer into one of four wage levels based on the role's experience and skill requirements.
| Level | Filings | Median offer |
|---|---|---|
| Level III — experienced | 80 | $116,235 |
Top employers filing for this role
Companies with the most certified filings for Senior Mechanical Engineers in Illinois. Median offer is across all of that employer's filings.
| Employer | Most-filed title | Filings | Median |
|---|---|---|---|
| Rivian Automotive, LLC | Sr. Automation Controls Engineer | 13 | $130,832 |
| RIVIAN AUTOMOTIVE, LLC | Sr. Process Engineer | 13 | $123,095 |
| Caterpillar Inc. | Senior Design Engineer | 8 | $116,771 |
| Gotion Illinois New Energy Inc. | Mechanical Engineer | 6 | $90,000 |
| HCL AMERICA INC | Senior Group Technical Architect | 2 | $126,431 |
| Institute of Gas Technology | Sr. Engineer I | 2 | $109,647 |
| Populus Group LLC | Quality/Test Engineer 4 | 1 | $128,898 |
| CATERPILLAR INC. | Control Systems Senior Engineer | 1 | $113,443 |
| WAL-MART ASSOCIATES, INC. | Senior Manager, Automation Engineering | 1 | $164,908 |
| Nidec Mobility America Corporation | Supplier Quality Group Manager | 1 | $115,000 |
Recent sample filings
A snapshot of recent certified offers. Each line is a real, public, verifiable record.
- Quality/Test Engineer 4 at Populus Group LLC$128,898ChillicotheWage Level IIIDecided Sep 25, 2025I-200-25261-319567
- Control Systems Senior Engineer at CATERPILLAR INC.$113,443CHILLICOTHEWage Level IIIDecided Sep 24, 2025I-200-25260-314991
- Senior Group Technical Architect at HCL AMERICA INC$126,431PEORIAWage Level IIIDecided Sep 22, 2025I-200-25258-307716
- Staff Joining Engineer at Rivian Automotive, LLC$130,832NormalWage Level IIIDecided Sep 16, 2025I-200-25252-295978
- Senior Manager, Automation Engineering at WAL-MART ASSOCIATES, INC.$164,908JolietWage Level IIIDecided Sep 15, 2025I-200-25251-292546
- Sr. Engineer I at Institute of Gas Technology$112,678Des PlainesWage Level IIIDecided Sep 5, 2025I-200-25240-274003
- Senior Performance/Simulation/Application Engineer at Caterpillar Inc.$113,443DECATURWage Level IIIDecided Aug 29, 2025I-200-25234-261020
- Supplier Quality Group Manager at Nidec Mobility America Corporation$115,000St. CharlesWage Level IIIDecided Aug 26, 2025I-200-25231-253135
Source: U.S. Department of Labor, Office of Foreign Labor Certification. Disclosed wages reflect what employers attested to pay; actual paid wages may differ. Only certified filings are shown — denied and withdrawn cases are excluded.