Stennis Space Center jobs in Mississippi in 2026: rocket testing, employers, and salary

NASA's John C. Stennis Space Center in Hancock County, Mississippi, is the largest rocket propulsion test facility in the United States. Every engine that powers NASA's Space Launch System (SLS) rocket for the Artemis lunar missions is tested here — the ground shakes, the Mississippi pines bend, and data from thousands of sensors confirms whether the hardware is flight-ready. In 2026, Stennis is experiencing a resurgence of activity driven by the production of new RS-25 engines for Artemis V and beyond.

But Stennis is more than just NASA. Over 30 federal agencies and private contractors operate on the 13,800-acre "fee area," making it one of the most diverse federal employment hubs in the Gulf Coast region. This guide covers who works there, what they earn, how to get hired, and what life on the Mississippi Gulf Coast is really like.

What happens at Stennis Space Center

Rocket propulsion testing

Stennis is NASA's premier rocket propulsion test facility. The center operates multiple test stands capable of testing everything from individual engines to full rocket stages:

A-Test Complex: The twin A-1 and A-2 test stands can each generate over 1 million pounds of thrust. These stands have tested Saturn V first stages, Space Shuttle Main Engines, and now RS-25 engines for SLS. The A-2 stand was recently modernized for next-generation engine testing.

B-Test Complex: The B-1 and B-2 stands handle smaller engines, component testing, and developmental test programs. NASA and commercial customers use these stands for a variety of propulsion research.

E-Test Complex: Houses the Fred Haise Test Stand (E-1), which was used for the RS-25 single-engine testing that continued through 2025 and into 2026. NASA conducted a 500-second full-duration hot-fire test of RS-25 engine No. 20001 here in June 2025.

RS-25 engine testing in 2026

The RS-25 engine program is the primary driver of Stennis activity. L3Harris Technologies (which acquired Aerojet Rocketdyne) is under contract to produce 24 new RS-25 engines for Artemis missions beginning with Artemis V. These new engines feature 3D-printed parts and redesigned structural components that reduce cost and manufacturing time.

In November 2025, NASA and L3Harris successfully test-fired the second new-production RS-25 engine at Stennis. Testing continued into early 2026, validating the modernized design before engines are integrated into SLS core stages.

Employers at Stennis

Stennis is not a single-employer facility. Over 30 organizations operate on-site, making it a diverse job market within a single secure campus.

NASA (Civil Service)

NASA's Stennis workforce includes roughly 1,200 civil servants across propulsion test engineering, facilities management, safety, environmental, IT, finance, and administrative functions. NASA civil service positions are posted on USAJobs.gov and follow the GS (General Schedule) pay scale.

Major contractors

Contractor	Primary Role at Stennis	Approximate Headcount
Syncom Space Services	Prime facility operations contractor	1,200+
L3Harris (Aerojet Rocketdyne)	RS-25 engine manufacturing and testing	500+
Jacobs Engineering	Engineering and technical services	300+
Northrop Grumman	Various programs	100+
Lockheed Martin	Various programs	50+

Syncom Space Services deserves special attention. As the prime contractor for Stennis facility operations and test support, Syncom manages the day-to-day operation of the test stands, including the operators who physically run the tests. If you want to be the person pressing the button that fires an RS-25, you are likely applying to Syncom, not NASA directly.

Other federal agencies

Stennis also hosts NOAA's National Data Buoy Center, the Naval Meteorology and Oceanography Command, the U.S. Navy, the EPA's Gulf of Mexico Program Office, and several other federal and state agencies. These organizations have their own hiring processes independent of NASA.

Salary ranges by role

Salaries at Stennis vary significantly depending on whether you work for NASA, a prime contractor, or a subcontractor. Here is a breakdown based on current data:

NASA civil service (GS scale)

Grade	Typical Role	Salary Range (Rest of US locality)
GS-7/9	Entry-level engineer, technician	**$49,000–$70,000**
GS-11/12	Mid-level engineer, project lead	**$73,000–$107,000**
GS-13	Senior engineer, branch chief	**$96,000–$125,000**
GS-14/15	Division chief, senior manager	**$114,000–$152,000**

Stennis falls under the "Rest of US" locality pay area, which means salaries are lower than NASA centers in Houston, the DC area, or California. The tradeoff is a dramatically lower cost of living.

Contractor positions

Role	Employer	Salary Range
Test Engineer	Syncom / L3Harris	**$70,000–$115,000**
Test Operator / Technician	Syncom	**$50,000–$80,000**
Propulsion Engineer	L3Harris / Jacobs	**$80,000–$130,000**
Mechanical Engineer	Various	**$65,000–$105,000**
IT / Cybersecurity	Various	**$60,000–$100,000**
Facilities / Maintenance	Syncom	**$40,000–$65,000**
Administrative / Support	Various	**$35,000–$55,000**

How to get hired

NASA civil service positions

All NASA civil service jobs are posted on USAJobs.gov. Stennis-specific positions are listed under the "Stennis Space Center, MS" location. Key tips:

• Apply to every relevant announcement: Federal hiring is slow and competitive. Apply broadly and be patient — the process can take 3 to 6 months from posting to start date.
• Tailor your resume to the announcement: Federal resumes are different from private-sector resumes. They are typically 3 to 5 pages and must explicitly address every qualification listed in the announcement. Use the exact language from the job description.
• Pathways program: New graduates should look for the NASA Pathways intern and recent-graduate programs, which provide a direct pipeline to civil service positions.

Contractor positions

Contractor positions are posted on each company's career website:

• Syncom Space Services: syncomspace.com/careers
• L3Harris: l3harris.com/careers
• Jacobs: jacobs.com/careers

Contractor hiring is generally faster than federal hiring — typically 4 to 8 weeks from application to start date.

Life on the Mississippi Gulf Coast

Stennis Space Center sits in Hancock County, Mississippi, between the cities of Bay St. Louis and Slidell, Louisiana. The area is part of the broader Mississippi Gulf Coast region, which extends from Waveland to Pascagoula.

Housing

The Gulf Coast is one of the most affordable regions near a major NASA center:

• One-bedroom apartment: $800 to $1,100 per month
• Two-bedroom apartment: $1,000 to $1,400 per month
• Single-family home purchase: $175,000 to $325,000 in Bay St. Louis, Waveland, or Diamondhead
• Higher-end options: Ocean Springs and Biloxi offer more developed housing markets with prices from $250,000 to $450,000

Many Stennis employees live in Bay St. Louis, a small coastal town with a growing arts community, local restaurants, and a walkable downtown. Others commute from Slidell, Louisiana (30 minutes west), which offers more shopping and suburban amenities. A small number commute from the New Orleans metro area (roughly one hour).

Cost of living

Mississippi has one of the lowest costs of living in the United States. Combined with no significant traffic congestion near Stennis, the quality-of-life-to-salary ratio is excellent:

• Groceries: 8 to 12 percent below the national average
• Housing: 20 to 35 percent below the national average
• Utilities: comparable to the national average
• State income tax: yes (Mississippi has state income tax, unlike Texas), but the rates are moderate at 4 to 5 percent

Climate and recreation

The Gulf Coast has a subtropical climate — hot, humid summers (May through September), mild winters, and a hurricane season from June to November. Hurricane preparedness is a real consideration for homeowners.

Recreation options include Gulf Islands National Seashore beaches, fishing (both saltwater and freshwater), boating, the De Soto National Forest for hiking, and the casino resorts along the Biloxi strip. New Orleans is within a 90-minute drive for world-class dining, music, and cultural events.

Career growth at Stennis

Stennis offers steady, long-term career paths rather than the rapid-promotion culture of commercial aerospace:

Technical advancement: Engineers can progress from GS-7 through GS-15 over a 15 to 25-year career, with increasing responsibility and scope at each grade. The engineering challenges evolve as new propulsion programs arrive.

Cross-center mobility: NASA employees can transfer between centers. Stennis engineers have moved to Marshall Space Flight Center (Huntsville, AL), Johnson Space Center (Houston, TX), and Kennedy Space Center (Florida) to broaden their experience.

Contractor-to-civil-service transition: This is a well-established path at Stennis. Contractor employees who demonstrate strong performance and apply through USAJobs have a meaningful advantage over external candidates because they already understand NASA's processes and culture.

Browse NASA and aerospace jobs in Mississippi on Zero G Talent. For related careers, see our guides to systems engineer at Lockheed Martin and what thermal engineers do.

Frequently asked questions

Is Stennis only about rocket testing?

No. While propulsion testing is the primary mission, Stennis also hosts Earth science research, autonomous systems development, technology transfer programs, and multiple non-NASA federal agencies. The center's diverse tenant base means job opportunities extend well beyond propulsion engineering.

How do I apply for a job at Stennis if I do not know which contractor to target?

Start with USAJobs.gov for NASA civil service positions and the Partners for Stennis website (partnersforstennis.org) for a directory of on-site employers. You can also search Indeed or Glassdoor with "Stennis Space Center" as the location to see all current openings across all employers.

Is Stennis growing or shrinking in 2026?

Growing. The new RS-25 engine production program ensures sustained testing activity through the late 2020s and into the 2030s. L3Harris is ramping up production of 24 new engines for future Artemis missions, and each engine requires extensive test campaigns at Stennis. Additionally, commercial propulsion companies are increasingly interested in using Stennis test facilities.

Do I need a security clearance to work at Stennis?

Not all positions require a security clearance, but you will need at minimum the ability to pass a background check for base access. Many engineering and technical positions require a Secret clearance or the ability to obtain one. U.S. citizenship is required for the majority of positions.

What is the commute like?

Stennis is accessible via Interstate 10 and state highways. Traffic is minimal compared to urban NASA centers. Most commutes from surrounding communities (Bay St. Louis, Waveland, Diamondhead, Slidell) are 15 to 35 minutes. There is no significant rush-hour congestion.