Principal Mechanical Engineer, Test Solutions Mechanical Lead
BAE Systems
Nashua, NH · Posted October 28, 2026
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Engineering jobs in the rankings
Rankings about engineering jobs
- Best cities for software and engineering jobs #1 San Francisco (3,412 openings)
- Best cities for engineering pay after cost of living #1 San Mateo ($216k)
- Most requested AI skills in engineering jobs #1 AI tools in daily work (6.1%)
- AI tools named most often in engineering jobs #1 Claude (1.7%)
- Employers with the most engineering jobs #1 Amazon (2,992 roles)
Pay compared with the market
This listing does not state pay. Across 32 open principal mechanical engineer listings that state pay, the middle half runs $156,000 to $196,500 and the median is $169,000.
Listed pay is what employers advertise, not what people are paid.
Principal Mechanical Engineer salaries by state · Check your own pay
How AI is used in this kind of work
AI use among mechanical engineers is little observed so far. Measured exposure for mechanical engineers: 8% (little observed).
Share of this job’s tasks that AI is already used for at work, from real usage. It is not a forecast of job loss, and a low number means no use seen yet. Source: Anthropic Economic Index.
BAE Systems has filed 2 layoff notices in the last twelve months, covering 174 workers, most recently March 2026. These are public filings with state labor departments, and an open role can sit alongside them. See the filings
About the job
Join our team as a Principal Mechanical Engineer, leading the design and development of advanced military systems. Oversee mechanical engineering for complex defense products, ensuring performance and reliability. Ideal for experienced engineers with a strong background in embedded systems and a passion for continuous improvement.