Browse Jobs
Browse fresh roles from company career pages, then filter by keyword, location, salary, skills, remote scope, and more. Each listing links back to the employer-controlled apply path when available.
288 jobs match your filters
1w
A
Senior Principal Mechanical Engineer
ASSYSTEM
🚀 Join the Fusion and Modular Nuclear Business Unit! 🚀 Take on a pivotal role in shaping the future of clean energy by establishing, leading, and managing the Cooling Water Island engineering team within a groundbreaking Small Modular Reactor (SMR) development program. Drive the
Bolton, England, United Kingdom
remoteFull-timeNot ApplicableEasy Apply
1w
A
Senior Principal Mechanical Engineer
ASSYSTEM
🚀 Join the Fusion and Modular Nuclear Business Unit! 🚀 Assystem has an exciting opportunity for a Senior Principal Mechanical Engineer to join our expanding Fusion and Modular Nuclear (FMN) business unit. As leaders in the design and development of new technologies, you will have
Bolton, England, United Kingdom
remoteFull-timeNot ApplicableEasy Apply
1w
Sr Principal Mechanical Engineer
Air Products
At Air Products, we reimagine what’s possible. By tapping into the motivation of our people and our collective experience, we create the ideas and innovations that drive us forward. When we come together – where every voice is heard and everyone knows they belong and matter – we
Bethlehem, Pennsylvania
remoteFull-time
1w
R
Bike Shop Principal Mechanical Engineer
RTX
Date Posted: 2026-06-11

 Country: United States of America Location: US-AZ-TUCSON-914 ~ 6880 S Tucson Blvd ~ BIKE SHOP 914 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: Active and transferable U.S. government issued security c
US-AZ-TUCSON-914 ~ 6880 S Tucson Blvd ~ BIKE SHOP 914
onsiteFull-time
1w
Mechanical Engineering Lead – Senior Principal Mechanical Engineer - Sign on Bonus!
BAE Systems, Inc.
Job Description BAE Systems, a rapidly expanding leader in the defense sector, is seeking a Senior Principal Mechanical Engineer to join our innovative team. We are seeking a proven leader to serve as the Lead Mechanical Engineer for a high‑visibility, multi‑disciplinary developm
Hudson, New Hampshire, United States
onsiteFull-time
2w
N
Principal / Senior Principal Mechanical Engineer (Lab Designer)
Northrop Grumman
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Secret TRAVEL: Yes, 10% of the Time Description At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact people
Melbourne, FL, US
remote
2w
N
Principal / Senior Principal Mechanical Engineer (Lab Designer)
Ngc
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Secret TRAVEL: Yes, 10% of the Time Description At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact pe
United States-Florida-Melbourne
hybridFull-time
2w
N
Principal / Senior Principal Mechanical Engineer (Lab Designer)
Northrop Grumman
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Secret TRAVEL: Yes, 10% of the Time Description At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact people
Melbourne, FL, US
remote
2w
R
Senior Principal Mechanical Engineer
RTX
Date Posted: 2026-06-02

 Country: United States of America Location: US-TX-MCKINNEY-513WD ~ 2501 W University Dr ~ WING D BLDG Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: Active and transferable U.S. government issued securi
US-TX-MCKINNEY-513WD ~ 2501 W University Dr ~ WING D BLDG
onsiteFull-time
2w
Production Support Hardware Lead - Senior Principal Mechanical Engineer
BAE Systems, Inc.
Job Description See what you’re missing. Our employees work on the world’s most advanced electronics – from detecting threats for F-35 pilots to illuminating the night for soldiers. Spanning air, land, sea, and space, we are developing the technology of tomorrow, delivered today.
Nashua, New Hampshire, United States
onsiteFull-time
2w
Mechanical Engineering Lead – Senior Principal Mechanical Engineer - Sign on Bonus!
BAE Systems, Inc.
Job Description BAE Systems, a rapidly expanding leader in the defense sector, is seeking a Senior Principal Mechanical Engineer to join our innovative team. We are seeking a proven leader to serve as the Lead Mechanical Engineer for a high‑visibility, multi‑disciplinary developm
Hudson, New Hampshire, United States
onsiteFull-time
3w
N
Sentinel - Principal Mechanical Engineer (18736*)
Northrop Grumman
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Secret TRAVEL: Yes, 10% of the Time Description At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact people
Roy, UT, US
onsite
3w
N
Sentinel Sr. Principal Mechanical Engineer - 16995
Northrop Grumman
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Secret TRAVEL: Yes, 10% of the Time Description At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact people
Roy, UT, US
onsite
3w
N
Sentinel Sr. Principal Mechanical Engineer - 16995
Ngc
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Secret TRAVEL: Yes, 10% of the Time Description At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact pe
United States-Utah-Roy
onsiteFull-time
3w
N
Sentinel - Principal Mechanical Engineer (18736*)
Ngc
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Secret TRAVEL: Yes, 10% of the Time Description At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact pe
United States-Utah-Roy
onsiteFull-time
3w
W
Senior Principal Mechanical Engineer
Worley
Building on our past. Ready for the future Worley is a global professional services company of energy, chemicals and resources experts headquartered in Australia. Right now, we’re bridging two worlds as we accelerate to more sustainable energy sources, while helping our customers
Baton Rouge, LA, US
remote
3w
N
Sentinel Principal/Sr Principal Mechanical Engineer -17104*
Northrop Grumman
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Secret TRAVEL: Yes, 10% of the Time Description At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact people
Colorado Springs, CO, US
hybrid
3w
N
Mechanical Engineer / Principal Mechanical Engineer - 17138*
Northrop Grumman
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Secret TRAVEL: Yes, 10% of the Time Description At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact people
Roy, UT, US
onsite
3w
N
Mechanical Engineer / Principal Mechanical Engineer - 17138*
Ngc
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Secret TRAVEL: Yes, 10% of the Time Description At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact pe
United States-Utah-Roy
onsiteFull-time
3w
Global Principal Mechanical Engineer
Alcoa
Shape Your World At Alcoa, you will become an essential part of our purpose: to turn raw potential into real progress. The way we see it, every Alcoan is a work-shaper, team-shaper, idea-shaper & world-shaper. As a leader within Alcoa, you can help fulfill our purpose and reali
Netherlands - Rotterdam
hybridFull-time
4w
A
Sr. Principal Mechanical Engineer
Avav
Worker Type Regular Job Description Summary The Sr. Principal Mechanical Engineer applies engineering techniques to design, install, modify, analyze, repair and test tools, engines, machines and other mechanically functioning equipment. Leads and supports the mechanical de
Moorpark, CA
onsiteFull-time
1mo
J
Senior Principal Mechanical Engineer (HTI) - JJMT Electrophysiology
Jj
At Johnson & Johnson, we believe health is everything. Our strength in healthcare innovation empowers us to build a world where complex diseases are prevented, treated, and cured, where treatments are smarter and less invasive, and solutions are personal. Through our expertise in
Irvine, California, United States of America
onsiteFull-time
1mo
Senior Principal Mechanical Engineer (HTI) - JJMT Electrophysiology
Johnson & Johnson
At Johnson & Johnson, we believe health is everything. Our strength in healthcare innovation empowers us to build a world where complex diseases are prevented, treated, and cured, where treatments are smarter and less invasive, and solutions are personal. Through our expertise in
Irvine, California, United States of America
onsiteFull-time
1mo
L
Staff / Principal Mechanical Engineer
Lila Sciences
Your Impact at LILA Lila Sciences is seeking an experienced Staff/Principal Mechanical Engineer to join our Hardware & Controls Engineering team. The specific title (Staff or Principal) will be determined based on experience level and expertise. As a key technical leader, you'll
Cambridge, MA, USA
remoteEasy Apply
1mo
N
Principal or Senior Principal Mechanical Engineer
Ngc
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Top Secret TRAVEL: Yes, 10% of the Time Description At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impac
United States-Maryland-Annapolis
hybridFull-time