Utah Northrop Grumman in 2026: Promontory, Clearfield, SRB manufacturing, and what the jobs pay
Northrop Grumman's Utah operations are responsible for one of the most iconic products in the American space program: the solid rocket boosters (SRBs) that lift the heaviest rockets off the pad. The Promontory facility in Box Elder County, about 30 miles west of Brigham City, manufactures and tests the solid propellant motors used on ULA's Atlas V and Vulcan Centaur, the Space Launch System (SLS) for NASA's Artemis program, and various missile defense interceptors. The Clearfield campus, 45 minutes south near Hill Air Force Base, houses engineering, program management, and integration work. Combined, these facilities employ over 5,000 people and form one of the largest aerospace concentrations in the Mountain West.
This is not a satellite shop or a software campus. Utah is where Northrop Grumman handles fire, propellant chemistry, and the physical manufacturing of the largest solid rocket motors ever produced for space launch. The work is tangible, the environment is industrial, and the setting is rural Utah with mountains in every direction.
What Northrop Grumman does in Utah
The Utah operations are part of Northrop Grumman's Propulsion Systems division (formerly Orbital ATK, formerly ATK, formerly Thiokol). The lineage goes back to Thiokol Chemical Corporation, which built the solid rocket boosters for the Space Shuttle starting in the 1970s. The facilities have been in continuous operation for over 60 years.
SLS solid rocket boosters. The five-segment solid rocket boosters for NASA's Space Launch System are manufactured, assembled, and tested at Promontory. Each SLS booster is the largest and most powerful solid rocket motor ever built for flight, producing 3.6 million pounds of thrust. The propellant (PBAN-based ammonium perchlorate composite) is mixed, cast, and cured in massive facilities at Promontory before the booster segments are shipped by rail to Kennedy Space Center for stacking.
GEM series strap-on boosters. The Graphite Epoxy Motors (GEM-63 and GEM-63XL) used on ULA's Atlas V and Vulcan Centaur are produced in Utah. These are smaller than SLS boosters but produced in higher quantities and represent ongoing production work.
Missile defense motors. Northrop Grumman Utah produces propulsion systems for Ground-based Midcourse Defense (GMD) interceptors and other missile defense programs. Details are classified, but the work involves advanced solid propellant formulation and motor design.
Static test operations. Full-scale motor static tests are conducted at Promontory, including qualification and development tests that produce some of the most powerful controlled explosions outside of nuclear weapons testing. Test stands at the facility can handle millions of pounds of thrust.
Propellant R&D. The facility includes propellant chemistry labs and development facilities where next-generation solid propellant formulations are researched and tested. This R&D work feeds into both space launch and defense programs.
Promontory is not a single building. The facility spans thousands of acres in the desert west of Brigham City, with manufacturing buildings, propellant storage magazines (separated by blast barriers), test stands, administrative offices, and miles of internal roads. The spread-out layout is a safety requirement: solid propellant is an explosive, and the facility is designed so that an incident in one area does not propagate to others. Working here means driving between buildings, and the commute within the facility can take 10-15 minutes.
Job categories and salary ranges
Utah Northrop Grumman roles cluster around propellant manufacturing, motor design, test operations, and program management. The Clearfield campus adds engineering office roles and integration work.
| Role | Salary range | Primary location | Description |
|---|---|---|---|
| Propulsion Engineer | $90K–$155K | Promontory / Clearfield | Motor design, nozzle design, internal ballistics, performance prediction |
| Propellant Chemist / Engineer | $85K–$145K | Promontory | Propellant formulation, mixing process, material characterization |
| Structural / Materials Engineer | $88K–$150K | Clearfield / Promontory | Motor case design, composite structures, thermal protection |
| Systems Engineer | $95K–$165K | Clearfield | Requirements, integration, verification, program-level technical coordination |
| Test Engineer | $88K–$145K | Promontory | Static fire test planning, data acquisition, post-test analysis |
| Manufacturing Engineer | $82K–$140K | Promontory | Production process design for propellant mixing, casting, and motor assembly |
| Quality Engineer | $80K–$135K | Promontory / Clearfield | Inspection, process control, non-conformance disposition |
| Program Manager | $120K–$190K | Clearfield | Schedule, budget, customer interface for SLS, GEM, or defense programs |
| Safety Engineer | $85K–$140K | Promontory | Explosive safety, hazard analysis, OSHA compliance |
| Propellant Technician | $22–$36/hr | Promontory | Propellant mixing, casting, motor assembly, handling operations |
| Quality Inspector | $20–$32/hr | Promontory | Visual and dimensional inspection of motor components |
Propulsion engineers at Promontory work on problems that are unique in aerospace: predicting the burn rate of solid propellant grains, designing nozzles that survive 5,000F+ exhaust temperatures, and ensuring that a motor produces exactly the right thrust profile for its entire burn duration. The discipline combines fluid dynamics, thermodynamics, chemistry, and structural mechanics.
Propellant chemists formulate and characterize the composite propellant mixtures. This is hands-on materials science: mixing ingredients (ammonium perchlorate, aluminum powder, and a polymer binder) in large-scale mixers, casting the propellant into motor casings, and testing samples for mechanical properties, burn rate, and aging characteristics. Safety protocols are stringent because the materials are energetic.
Many Northrop Grumman Utah positions require a Secret or Top Secret clearance due to missile defense work. Cleared engineers in Utah earn 10-20% more than their uncleared counterparts. Because Utah's aerospace talent pool is smaller than California or Colorado, employers compete actively for cleared professionals, and clearance holders have strong negotiating leverage.
Cost of living and lifestyle in Northern Utah
Northern Utah offers a cost of living that is meaningfully lower than California or Colorado aerospace hubs, with a quality of life that many aerospace engineers find attractive.
| Expense | Brigham City / Clearfield area | Colorado Springs | Los Angeles / El Segundo |
|---|---|---|---|
| Median home price | $380,000 | $445,000 | $950,000+ |
| 1BR apartment rent | $1,000–$1,400/mo | $1,200–$1,600/mo | $2,200–$2,800/mo |
| State income tax | 4.65% (flat) | 4.4% (flat) | 9.3–13.3% |
| Groceries (monthly) | $350 | $380 | $550 |
Where employees live:
For Promontory workers:
- Brigham City (15-20 minutes from Promontory). Small city (~19,000 population) that serves as the main residential area for Promontory employees. Affordable housing, basic amenities, and a quiet lifestyle.
- Logan (40 minutes north). Home of Utah State University. More amenities, younger demographic, and access to Cache Valley outdoor recreation.
- Tremonton / Garland (15-25 minutes from Promontory). Very small towns with the lowest housing costs.
For Clearfield workers:
- Clearfield / Layton / Kaysville (immediate area). Suburban communities near Hill AFB with good schools, shopping, and restaurants. Most Clearfield employees live within 15 minutes of the campus.
- Ogden (15-20 minutes north). Larger city with a downtown revitalization underway, craft breweries, restaurants, and a historic district.
- Salt Lake City (30-45 minutes south). Full urban amenities, nightlife, dining, and access to the largest airport in the region. Some Clearfield employees commute from SLC.
Outdoor recreation is the lifestyle anchor for northern Utah. Skiing at Snowbasin, Powder Mountain, and Park City is 30-60 minutes away. Hiking, mountain biking, fishing, and camping are accessible year-round. The Wasatch Front provides a dramatic mountain backdrop that many aerospace transplants from California or Texas find irresistible.
Northrop Grumman is not the only aerospace employer in northern Utah. L3Harris has operations in Salt Lake City. Boeing has a satellite facility in the area. Hill Air Force Base employs thousands of DoD civilians and military personnel. And the University of Utah and Utah State University produce a steady pipeline of aerospace engineering graduates. The region has a self-sustaining aerospace ecosystem.
Northrop Grumman Utah benefits and compensation
Northrop Grumman offers a competitive benefits package across all locations:
- 401k match: 6% employer match (dollar-for-dollar on first 6% of salary)
- Annual bonus: 5-12% of base salary depending on performance and company results
- Health insurance: Multiple plan options (PPO, HDHP with HSA)
- Pension: Northrop Grumman still maintains a defined benefit pension for some employees, though new hires may not be eligible. Check during the offer process.
- 9/80 schedule: Many Utah positions offer the 9/80 compressed work schedule: work 9 hours per day for 9 days and get every other Friday off. This is highly popular and a genuine quality-of-life benefit.
- Education assistance: Tuition reimbursement up to $10,000/year for approved degree programs
The 9/80 schedule is worth highlighting because it provides 26 three-day weekends per year without reducing total hours worked. For engineers who enjoy outdoor recreation, this schedule is a major perk in Utah.
Programs and future outlook
SLS / Artemis. The SLS solid rocket booster program is the anchor for Promontory. Each Artemis mission requires two five-segment boosters, and the Artemis campaign is planned to continue through the late 2020s and beyond. This provides steady work for manufacturing, quality, and test personnel.
GEM-63 production. ULA's Vulcan Centaur uses GEM-63XL strap-on boosters, and the production line at Promontory supports an ongoing launch manifest. As Vulcan replaces Atlas V, the GEM production workload transitions but continues.
Missile defense. The GMD and Next Generation Interceptor (NGI) programs drive classified work at Promontory that is expected to grow as the US invests more in missile defense capabilities.
Next-generation solid propulsion. Northrop Grumman is researching advanced propellant formulations and motor designs for future vehicles. This R&D work keeps the Utah facilities at the forefront of solid propulsion technology.
How to apply
All positions are listed on northropgrumman.com/careers. Filter by location: Promontory, UT or Clearfield, UT. Roles that are frequently open:
- Propulsion Engineer (various levels)
- Systems Engineer
- Manufacturing Engineer
- Propellant Technician
- Quality Engineer / Inspector
- Program Manager
Application tips:
- Highlight any experience with energetic materials, solid propulsion, composite materials, or large-scale manufacturing
- If you have a security clearance, make it prominent
- For technician roles, emphasize safety consciousness and hands-on manufacturing experience
- The 9/80 schedule and outdoor lifestyle are draws, but lead with your technical qualifications in the application
Browse Northrop Grumman careers on Zero G Talent, or explore propulsion engineering, structures engineering, and defense jobs across the space industry. For other Northrop Grumman location profiles, see our guides to Northrop Grumman Colorado and Northrop Grumman San Diego.
Frequently asked questions
How far is Promontory from Salt Lake City?
Promontory is approximately 80 miles north of Salt Lake City, roughly a 1 hour and 15 minute drive via I-15 and Highway 83. Most Promontory employees live in Brigham City (20 minutes away) rather than commuting from SLC.
Does Northrop Grumman Utah require a security clearance?
Many positions require a Secret clearance, and some missile defense roles require Top Secret. Northrop Grumman sponsors clearances for new hires. Positions on commercial space programs (SLS, GEM) may require less stringent clearance levels. US citizenship is required for all positions due to ITAR restrictions.
What is the work schedule at Promontory?
Many positions operate on a 9/80 compressed schedule (every other Friday off). Manufacturing and test operations may run shifts. Standard work hours are 40 per week, with occasional overtime during production surges or test campaigns. The pace is more predictable than commercial space companies.
Is there career growth at Northrop Grumman Utah?
Yes. The Utah operations are large enough to offer career progression from junior engineer through senior technical fellow or into program management. Internal mobility within Northrop Grumman also allows transfers to other locations (Redondo Beach, Chandler, Dulles) for different programs and experiences.
What degrees are most useful for Northrop Grumman Utah jobs?
Mechanical engineering, aerospace engineering, chemical engineering (for propellant work), and materials science are the most directly applicable degrees for Promontory. Systems engineering, electrical engineering, and computer science are relevant for Clearfield positions. Utah State University's aerospace program has a strong pipeline to Northrop Grumman.
