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Mechanical Engineer, AST, Mechanical Experimental Equipment (Direct Hire)

National Aeronautics and Space Administration
John C. Stennis Space Center

Summary

You will serve as a Mechanical Engineer within the Operations Division of the Engineering and Test Directorate, supporting the development, operation, and readiness of facility test support systems including cryogenic, fluid, structural, and high-pressure liquid/gas systems required to conduct propulsion test activities at NASA's Stennis Space Center.

Overview

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Accepting applications
Open & closing dates
05/01/2026 to 05/05/2026
Salary
$74,678 - $97,087 per year
Pay scale & grade
GS 11
Location
Many vacancies in the following location:
Stennis Space Ctr
Stennis Space Center, MS
Remote job
No
Telework eligible
Yes—as determined by the agency policy.
Travel Required
Occasional travel - You may be expected to travel for this position.
Relocation expenses reimbursed
No
Appointment type
Permanent
Work schedule
Full-time
Service
Competitive
Promotion potential
13
Job family (Series)
Supervisory status
No
Security clearance
Not Required
Drug test
Yes
Position sensitivity and risk
Non-sensitive (NS)/Low Risk
Trust determination process
Financial disclosure
No
Bargaining unit status
No
Announcement number
SSC-26-DE-12950135-JN
Control number
867368500

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Duties

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  • Serves as a mechanical engineer in the development, test, checkout and readiness of technical systems (cryogenic, hydraulic, pneumatic, etc.) required in support of both rocket engine and component-level test projects at Stennis Space Center.
  • Assists in resolving mechanical engineering problems utilizing advanced technical knowledge of mechanical systems such as piping systems, pipe supports, test article support structures, and fluid components.
  • Assists in consulting with management and personnel in preparing requirements and criteria for construction/modification of facility systems. Resolves technical difficulties that can be overcome by changes in approach, criteria or requirements.
  • Applies theories, principles, practices, and techniques associated with facility systems such as valve control pneumatics, hydraulics, cryogenics, and high-pressure gases including components, piping, and tubing.

Requirements

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Conditions of employment

  • This position is open to U.S. citizens, nationals or those who owe allegiance to the U.S.
  • This position may require a one-year probationary period. If selected, the requirement to serve such period will be determined by Title 5 of the Code of Federal Regulations, Part 11. **See Additional Information section**
  • You must meet qualifications requirements by the closing date of this announcement.
  • Financial Disclosure, Drug Testing, and/or the Travel Requirements for this position may differ and be required based on the duty location/Directorate/Division/Branch requirements.
  • Position subject to pre-employment background investigation or higher-level clearance. Investigation/Clearance may differ and be required based on the duty location/Directorate/Division/Branch requirements.

Qualifications

In addition to the Basic Education Requirement (in the Education section below), to qualify for this position you must meet the requirements below. Specialized experience is experience that has equipped you with the particular ability, skill, and knowledge to successfully perform the duties of this position and is typically in or related to this line of work.

NASA utilizes OPM-approved qualification and rating requirements specific for Aerospace Technology (AST) positions which recognizes NASA's unique aerospace work. The specific qualifications and minimum education requirements are further described below and within the education section of the job announcement.

To qualify for GS-11, you must have:
a) You must have one year of directly related specialized experience equivalent to the GS-09 level:

  • Applying engineering theories, principles, and practices to the design, operation, and maintenance of cryogenic systems, including valve-control pneumatics, hydraulics, and high-pressure gas systems (nitrogen, helium, hydrogen, and air), encompassing associated components (such as piping, tubing);
  • Experience performing tasks related to the development, test, checkout and readiness of technical systems (such as cryogenic, hydraulic, pneumatic, etc.) required in support of both rocket engine and component level test projects; and
  • Generating work authorization documents to support the installation, operation, and troubleshooting of mechanical systems used in propulsion test facilities.
OR
b) Completed all requirements for a doctoral degree (i.e., Ph.D. or equivalent) in an appropriate field
OR
c) Completed 3 full academic years of graduate education in an appropriate field
OR
d) Have an equivalent combination of experience and graduate study as discussed in a), b) and c) above Your resume must include a clear and detailed narrative description, in your own words, of how you meet the required specialized experience. Experience statements copied from a position description, vacancy announcement or other reference material constitutes plagiarism and may result in disqualification and losing consideration for the job.

NASA prohibits the use of artificial intelligence (AI) or AI-assisted tool in drafting application and assessment responses. Please visit https://www.nasa.gov/careers/how-to-apply/#Artificial-Intelligence to review NASA's guidance on the use of AI tools during the application process.

Required college majors for applicants qualifying on the basis of undergraduate or graduate education only:

Code 740 Facilities: Aeronautical Engineering, Aeronautics, Aerospace Engineering, Architecture, Astronautical Engineering, Ceramic Engineering, Ceramics, Chemical Engineering, Civil Engineering, Electrical Engineering, Electronics Engineering, Industrial Engineering, Materials Engineering, Applied Mechanics, Engineering Mechanics, Mechanical Engineering, Metallurgical Engineering, Nuclear Engineering, Nuclear Engineering Physics, Optical Engineering, Structural Engineering, Welding Engineering. Other majors will qualify if the major includes or is supplemented as follows: Astronautics, Biomedical Engineering, Computer Science, Computer Engineering, Geology, Materials Science, Mathematics (Pure or Applied), Metallurgy, Physics, Applied Physics, Engineering Physics (or other related field), if includes or is supplemented by 12 semester hours (or the equivalent) in appropriate physical science or engineering courses.

Education

Basic Education Requirement: You must have successfully completed a bachelor's degree with a major in one of the following:
a) Engineering from a college or university that has ABET accredited engineering programs
b) Physical Science, Mathematics, Life Science, Computer Science, or other field of Science
c) Social science, medical, or other fields directly related to the duties of the position.

If you did not complete a qualifying bachelor's degree, you may be eligible if you have obtained a graduate degree in an AST qualifying field, as listed above.

Degrees in engineering technology are not considered qualifying for this position.

How You May Qualify at the GS-09 Level and Above
Applicants at the GS-09 level and above who meet the basic education requirement and possess at least one year of directly related experience may be considered qualified even when their academic major or coursework is not an exact match to the specialty area of the position. In these cases, greater weight is given to the quality and level of the applicant's directly related experience.

Engineering degrees earned within the United States: Engineering degrees earned within the United States must be from a college or university that has at least one ABET accredited engineering program. To find out if a school has at least one ABET accredited program, please visit http://www.abet.org.

Engineering degrees earned outside the United States: Engineering degrees earned outside the United States must be recognized by a Mutual Recognition Agreement (MRA), often known as accords. These are non-governmental agreements among organizations that accredit academic degree programs. MRAs recognize the substantial equivalence of mature accreditation systems and programs accredited by signatory organizations within their jurisdictions. For a listing of Signatories, please visit, https://www.abet.org/global-presence/mutual-recognition-agreements/is-your-program-recognized/.

Science and other related degrees earned within the United States: Science and other related degrees must have been awarded from colleges or universities that are accredited by recognized accrediting organizations. For a list of schools that meet this criteria, go to http://ope.ed.gov/accreditation/.

Science and other related degrees earned outside the United States: If you are using education completed in foreign colleges or universities to meet the qualification requirements, you must show that the education credentials have been evaluated by a private organization that specializes in interpretation of foreign education programs. These education credentials must be deemed equivalent to that gained in an accredited U.S. education program; or full credit has been given for the courses at a U.S. accredited college or university. For further information, visit: https://sites.ed.gov/international/recognition-of-foreign-qualifications/.

All degrees must have been received in the year of, or any year subsequent to the original date of accreditation.

Additional information

Additional selections may be made for similar positions across NASA within the local commuting area(s) of the location(s) identified in this announcement. By applying, you agree to have your application shared with interested selecting official(s) within NASA. CTAP/ICTAP will be cleared for any additional selection from this announcement.

If you have special priority selection rights under the Agency Career Transition Assistance Program (CTAP) or the Interagency Career Transition Assistance Program (ICTAP), you must:
  • Indicate your eligibility when applying for a position. The questionnaire asks you to identify your ICTAP/CTAP eligibility.
  • Meet the minimum qualifications requirements for the position
  • Submit proof that you meet the requirements for CTAP/ICTAP as indicated in 'Required Documents'
For additional information about CTAP/ICTAP eligibility, click here - https://www.opm.gov/policy-data-oversight/workforce-restructuring/employee-guide-to-career-transition/#ictap

Any applicant that received a Voluntary Separation Incentive Payment (VSIP) from the federal governmentwithin the last five years based of the closing date of this announcement, if selected, may be required to repay the full amount prior to establishing a start date. For additional information on the VSIP repayment requirement, click here - https://www.opm.gov/policy-data-oversight/workforce-restructuring/voluntary-separation-incentive-payments/

Per Executive Order 14343, this position is not part of a bargaining unit.

Probationary Period

You may be required to serve a one-year probationary period during which we will evaluate your fitness and whether your continued employment advances the public interest. If selected, the requirement to serve such period will be determined by Title 5 of the Code of Federal Regulations, Part 11.

In determining if your employment advances the public interest, we may consider:

  • your performance and conduct;

  • the needs and interests of the agency;

  • whether your continued employment would advance organizational goals of the agency or the Government; and

  • whether your continued employment would advance the efficiency of the Federal service.

Upon completion of your probationary period your employment will be terminated unless you receive certification, in writing, that your continued employment advances the public interest.

Candidates should be committed to improving the efficiency of the Federal government, passionate about the ideals of our American republic, and committed to upholding the rule of law and the United States Constitution.

How you will be evaluated

You will be evaluated for this job based on how well you meet the qualifications above.

Direct Hire Authority: These positions will be filled through the Office of Personnel Management's Direct Hire Authority. Category rating and veterans' preference will not be considered in evaluating applicants. For more information on Direct Hire Authority, please see: OPM Direct Hire Fact Sheet.

Veterans: Under the provisions of Direct Hire Authority, veterans' preference does not apply. However, applicants who are eligible for veterans' preference are encouraged to include that information in their application and submit supporting documentation (i.e. DD-214, or other substantiating documents). For more information please see: Veterans' Preference information on the FedsHireVets website.

You will be evaluated for this position based on how well you meet the qualifications and eligibility requirements outlined in this vacancy announcement. Please ensure your application materials and responses accurately reflect your experience and competencies, as misrepresentation may result in removal from consideration.

You will be assessed on the following competencies:

  • Facility Mechanical Engineering
  • Mechanical Engineering
  • Technical Competence
  • Written Communication
  • Decision Making
  • Problem Solving
Some of these competencies will be assessed using a Written Interview technical assessment, while others may be evaluated during a structured interview.

Candidates eligible for ICTAP/CTAP, reemployment priority or priority consideration will be referred before other candidates, as necessary.

NASA considers paid and unpaid experience, including volunteer work done through National Service programs (e.g., Peace Corps, AmeriCorps) and other organizations (e.g., professional; philanthropic; religious; spiritual; community, student, social). Volunteer work helps build critical competencies, knowledge, and skills and can provide valuable training and experience that translates directly to paid employment. You will receive credit for all qualifying experience, including volunteer experience.

NASA will not ask you to disclose criminal history record information during the application process or before we make a conditional/tentative offer of employment. If you apply for this position and are selected, NASA will conduct a suitability/security background investigation after you accept a tentative job offer. If you feel you are asked to disclose your criminal history before you accept a tentative offer and wish to file a complaint within 30 days, please contact: Agency-FCCJ@NASA.gov.

John C. Stennis Space Center

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Agency contact information

Hiring Support Hub
Fax
1-866-779-6772
Email
nssc-hiring@mail.nasa.gov
Address
Stennis Space Center
Building 1111, Jerry Hlass Road
Stennis Space Center, MS 39529
US

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