As an engineer in the Fluid Dynamics branch, you will provide fluid dynamics solutions to complex problems in launch vehicle and spacecraft propulsion systems, with specific applications to propellant tanks and cryogenic fluid management using Computational Fluid Dynamics (CFD) as the primary analysis tool. Develops, implements, executes, and validates detailed solution algorithms and methodologies in the areas of transient and multiphase fluid physics, dynamics, and conjugate heat transfer.
Summary
As an engineer in the Fluid Dynamics branch, you will provide fluid dynamics solutions to complex problems in launch vehicle and spacecraft propulsion systems, with specific applications to propellant tanks and cryogenic fluid management using Computational Fluid Dynamics (CFD) as the primary analysis tool. Develops, implements, executes, and validates detailed solution algorithms and methodologies in the areas of transient and multiphase fluid physics, dynamics, and conjugate heat transfer.
Develops fluid dynamics analysis products including design solutions, loads, environments, and acoustics for launch and in-space propulsion systems; lander propulsion systems; and propellant tanks and storage.
Supports the design and development of cryogenic propellant management systems with CFD simulations and modeling; provides tank dynamics slosh characterization (mass, frequency, and damping) for launch and in-space propellant tanks.
Provides slosh model parameters for Guidance, Navigation, and Control applications; assists in the design and development of anti-slosh baffles and propellant management devices.
Analyzes flow regimes to include transient and unsteady flows; reacting and multispecies flows; multiphase flows; continuum and rarefied flows; and acoustics.
Develops, validates, and applies advanced CFD models and methods to address design trades and parametric studies to evolve advanced hardware.
Identifies the first-order fluid dynamic physics of interest and determines the appropriate model fidelity to support the needs of the project.
Provides fluid dynamics support to risk assessments, anomaly investigations and resolutions, and failure investigations.
Develops, executes, and provides models of fluid dynamics characteristics of systems and subsystems.
Duties described above are for full-performance level. Duties assigned at a lower grade level will be of more limited scope and complexity, performed with less independence and will be commensurate with the grade of selected employee.
Position subject to pre-employment background investigation.
A one-year trial period may be required.
Qualifications
In addition to the Basic Education Requirement, you must have one year of specialized experience equivalent to the next lower grade, which has equipped you with the particular competencies needed to successfully perform the duties of the position described above.
Specialized experience is defined as professional working experience that includes the following:
To qualify for the GS-11 level, specialized experience is defined as:
-Experience in cryogenic fluid dynamics and multiphase flows, unsteady flows, CFD, heat transfer, and fluid dynamics of propulsion systems. -Experience with CFD solvers cast in the Loci framework, such as Loci/CHEM or Loci/STREAM is highly desirable. -Experience in fluid dynamics tasks including defining analysis requirements, and planning the analysis process. -Experience assisting in diagnosing issues in CFD practices.
OR
-Completion of all requirements for a doctoral degree (Ph.D. or equivalent) in an appropriate field; OR -Completion of three full academic years of graduate education in an appropriate field; OR -An equivalent combination of experience and graduate education.
To qualify for the GS-12 level, specialized experience is defined as:
-Experience in cryogenic fluid dynamics and multiphase flows, unsteady flows, CFD, heat transfer, and fluid dynamics of propulsion systems. -Experience with CFD solvers cast in the Loci framework, such as Loci/CHEM or Loci/STREAM is highly desirable. -Experience in complex fluid dynamics tasks including defining analysis requirements, and planning the analysis process. -Experience in independently diagnosing issues in CFD practices.
To qualify for the GS-13 level, specialized experience is defined as:
-Experience in cryogenic fluid dynamics and multiphase flows, unsteady flows, CFD, heat transfer, and fluid dynamics of propulsion systems. -Experience with CFD solvers cast in the Loci framework, such as Loci/CHEM or Loci/STREAM is highly desirable. -Experience in leading complex fluid dynamics tasks including defining analysis requirements, planning the analysis process, and executing the plan. -Experience in independently diagnosing issues in CFD practices and pushing the analysis beyond the state-of-the-art.
Your resume must include a clear and detailed narrative description, in your own words, of how you meet the required specialized experience. Experiences copied from a position description, vacancy announcement or other reference material constitutes plagiarism and may result in disqualification and losing consideration for the job.
Education
Basic education requirement (combine with appropriate grade level AST qualification statement) Basic Education Requirement: A bachelor's degree from an accredited college or university with major study in Aeronautical Engineering, Aeronautics, Aerospace Engineering, Architecture, Astronautical Engineering, Astronautics, Astronomy, Astrophysics, Biomedical Engineering, Ceramic Engineering, Ceramics, Chemical Engineering, Chemistry, Civil Engineering, Computer Engineering, Computer Science*, Life Science, Earth and Planetary Science, Electrical Engineering, Electronics Engineering, Geology, Geophysics, Industrial Engineering, Materials Engineering, Materials Science, Mathematics (Pure or Applied), Applied Mechanics, Engineering Mechanics, Mechanical Engineering, Metallurgical Engineering, Metallurgy, Meteorology, Nuclear Engineering, Nuclear Engineering Physics, Oceanography, Optical Engineering, Physics, Applied Physics, Engineering Physics, Space Science, Structural Engineering, Welding Engineering or other appropriate physical science or engineering field.
Degrees in engineering technology are not considered to be qualifying for this position.
*Note: Curriculum must include 30 semester hours of course work in a combination of mathematics, statistics and computer science that provided in-depth knowledge of the following: (1) theoretical foundations and practical applications of computer science, including digital computer system architecture and system software organization, the representation and transformation of information structures and the theoretical models for such representations and transformations; and (2) essential mathematical and statistical techniques. Of the 30 semester hours, 15 must be in any combination of statistics and mathematics which includes differential and integral calculus.
U.S. Engineering degree(s): If you earned an U.S. Engineering degree, it must have been awarded from a college or university school of engineering with at least one curriculum accredited by the Engineering Accreditation Commission (EAC) of the Accreditation Board for Engineering and Technology (ABET). To find out if a degree meets this requirement, go to http://www.abet.org.
All Other U.S. Education: A degree(s) 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/.
Foreign Engineering degree(s): If you earned a foreign Engineering degree it 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/globalpresence/ mutualrecognition- agreements/is-your-program-recognized/.
All Other Foreign Education: 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://www2.ed.gov/about/offices/list/ous/international/usnei us/edlite-visitus-forrecog.html.
All degrees must have been received in the year of, or any year subsequent to the original date of accreditation.
You must indicate your major as well as your degree in order to receive full consideration for this position.
Additional information
INDIVIDUALS SELECTED UNDER THIS ANNOUNCEMENT MAY BE ELIGIBLE FOR CONVERSION TO A PERMANENT APPOINTMENT UNDER THE PROVISIONS OF 5 U.S.C. 9806(b).
This position may be filled at either the GS-11, GS-12, or GS-13 level.
As identical vacancies are identified, additional selections may be made.
Any applicant tentatively selected for this position may be required to undergo a pre-employment background investigation. Individuals who have special priority selection rights under the Agency Career Transition Assistance Program (CTAP) or the Interagency Career Transition Assistance Program (ICTAP) must be well qualified for the position to receive consideration for special priority selection. See 'How You Will Be Evaluated' for definition of well qualified. Federal employees seeking CTAP/ICTAP consideration must indicate their eligibility when applying for a position. The USAJOBS resume asks you to identify your ICTAP eligibility; the NASA Supplemental Information asks you to identify your CTAP eligibility. If you are selected for the position, you must be prepared to submit proof that you meet the requirements for CTAP/ICTAP. This includes a copy of the agency notice, a copy of their most recent Performance Rating and a copy of their most recent SF-50 noting current position, grade level, and duty location.
As a condition of employment, male applicants born after December 31, 1959, must certify that they have registered with the Selective Service System, or are exempt from having to do so under the Selective Service Law. In order to receive preference in hiring, you must clearly identify your claim for veterans preference on your resume.
NASA's Applicant Guide provides the information needed to assist you in determining whether or not you can claim 5 or 10 point veterans preference. You should not submit documents to prove your eligibility for veterans preference at this time. However, you must be prepared to submit proof of veterans preference (DD-214, and, if claiming 10-point preference, SF-15 plus proof required by that form) as requested by the Human Resources Office. Veterans preference will only be considered based on what is supported For instance, if you claim 10-point preference, but are only able to document 5-point preference, you will be considered accordingly. If you fail to provide the required documents within the stated time period, we may withdraw a job offer and/or remove you from further consideration.
Your USAJOBS account asks you to assign a name to each of your resumes. When you apply to a NASA position, we will show you the text of the resume you have submitted, but we do not maintain the name you have assigned to that resume. If you wish to keep track of that information, we recommend you make note of it at the time you apply.
A career with the U.S. government provides employees with a comprehensive benefits package. As a federal employee, you and your family will have access to a range of benefits that are designed to make your federal career very rewarding. Opens in a new windowLearn more about federal benefits.
Eligibility for benefits depends on the type of position you hold and whether your position is full-time, part-time or intermittent. Contact the hiring agency for more information on the specific benefits offered.
How you will be evaluated
You will be evaluated for this job based on how well you meet the qualifications above.
NASA uses an automated system (Resumix) that matches the competencies extracted from your resume to the competencies identified by the selecting official for the position. Based on the competencies you match, you are placed in one of three categories identified as 90, 80, or 70 pt. quality categories, which are defined as:
90 pt. Category - Tentatively meets (until subsequent confirmation upon referral) the basic qualification requirements identified in the vacancy announcement and has experience in the same or similar job that has demonstrated superior proficiency in the primary requirements of the position.
80 pt. Category - Tentatively meets (until subsequent confirmation upon referral) the basic qualification requirements identified in the vacancy announcement and demonstrates satisfactory proficiency in the primary requirements of the position.
70 pt. Category - Fails to meet criteria described in the 80 pt. category.
Additional application guidance is available in NASA's Applicant Guide.
Information for Veterans: The Category Rating Process protects the rights of veterans by placing them ahead of non-preference eligibles within each category. Preference eligibles who meet qualification requirements and have a compensable service-connected disability of at least 10 percent must be listed at the top of the highest quality category, except when the position being filled is scientific or professional at the GS-09 grade level or higher.
For the purpose of the Career Transition Assistance Program (CTAP) and the Interagency Career Transition Assistance Program (ICTAP), candidates rated in the top quality category are considered well-qualified
A career with the U.S. government provides employees with a comprehensive benefits package. As a federal employee, you and your family will have access to a range of benefits that are designed to make your federal career very rewarding. Opens in a new windowLearn more about federal benefits.
Eligibility for benefits depends on the type of position you hold and whether your position is full-time, part-time or intermittent. Contact the hiring agency for more information on the specific benefits offered.
NASA's application process has been specifically developed to ensure that we only ask you for the information we absolutely need to evaluate your qualifications and eligibility. In order to apply for this position, you only need to submit your resume and answer the screening questions and supplemental information. No additional documentation is accepted at the time of application. (For example you need not submit narrative 'KSA' statements; they are not required and will not be evaluated.) In this way we allow you to focus on preparing a resume that best describes your background and abilities. For assistance in preparing your resume, consult the Applicant Guide. Nothing further is required until requested by the Human Resources Office. At that point, we may ask you to submit documentation to support statements made in your resume. For example, we may ask you to provide academic transcripts or proof of Federal employment status. If you are claiming veterans' preference, we may ask you to submit proof of veterans preference (DD-214, and, if claiming 10-point preference, SF-15 plus proof required by that form). If you fail to provide the required documents within the stated time period, we may withdraw a job offer and/or remove you from further consideration.
If you are relying on your education to meet qualification requirements:
Failure to provide all of the required information as stated in this vacancy announcement may result in an ineligible rating or may affect the overall rating.
Before you begin the application process, please read the vacancy announcement carefully and have all required information available. Failure to submit a resume that contains all of the required information may result in loss of consideration. Your application must be received no later than midnight Eastern Time on the closing date of the announcement.
You may begin the process of submitting your resume by clicking on the 'Apply Online' link. In order to be considered, you must submit a resume completed on the USAJOBS site. When completing your USAJOBS resume, please remember that NASA limits resumes to approximately 32,000 characters including spaces.
NASA does not accept uploaded resumes created outside of the USAJOBS resume builder process. Additionally, NASA does not accept documents attached through the USAJOBS' document attachment feature.
Once you submit your resume to NASA, you will be transferred to a NASA website and asked to complete a short series of NASA-specific questions. Your answers will not be saved unless you finish the entire application. You may edit a previously-submitted application, if the announcement is still open.
If you successfully apply, USAJOBS will show your application status as 'Received'. If your status is 'Unavailable', you have not successfully applied. Do not rely on a USAJOBS email to confirm successful application. Only an email from NASA confirms a successful application.
If you are unable to apply electronically for this position, submit your resume and supplemental questions to: National Aeronautics and Space Administration (NASA) 4200 Rideout Road Resume Operations Center/Mailstop: HS50 Marshall Space Flight Center, AL 35812 DO NOT submit your resume directly to the Center advertising this vacancy. Mailed resumes must be received by the close of business on the closing date of the announcement. Hard copy resumes requirements are provided at:Hard Copy Resume Requirements.
If you are a first time applicant, we recommend that you review NASA's Applicant Guide to ensure that you are providing a complete resume. Failure to submit the supplemental data and a resume that contains all of the required information may result in loss of consideration for positions. All applications must be received no later than midnight Eastern Time on the closing date of the announcement.
NASA's Resume Operations Center
4200 Rideout Road, Mailstop HS50
Marshall Space Flight Center, AL 35812
US
Next steps
Candidates for NASA positions are evaluated using our automated staffing and recruitment system, NASA STARS, which compares your skills and experience as described in your resume with the requirements of the position. If you are found to be a highly qualified candidate, you will be referred to the selecting official for further consideration. (In some cases, individuals with priority for special consideration must be considered and selected before other candidates.) Whether or not you are contacted for an interview depends upon the location of the position and the judgment of the selecting official. At NASA, we pride ourselves on efficient and timely recruitment actions, and you can normally expect to learn the outcome of the selection process in a fairly short period of time. In addition, to ensure that you can measure progress for yourself, NASA provides you with regularly updated information on the status of the vacancy announcement.
To receive consideration, you must submit a resume and answer NASA-specific questions. The NASA questions appear after you submit your resume and are transferred to the NASA web site. If you successfully apply, USAJOBS will show your application status as 'Received'. If your status is 'Application Status Not Available', you have not successfully applied. Do not rely on a USAJOBS email to confirm successful application. Only an email from NASA confirms a successful application.
The Federal hiring process is set up to be fair and transparent. Please read the following guidance.
NASA's application process has been specifically developed to ensure that we only ask you for the information we absolutely need to evaluate your qualifications and eligibility. In order to apply for this position, you only need to submit your resume and answer the screening questions and supplemental information. No additional documentation is accepted at the time of application. (For example you need not submit narrative 'KSA' statements; they are not required and will not be evaluated.) In this way we allow you to focus on preparing a resume that best describes your background and abilities. For assistance in preparing your resume, consult the Applicant Guide. Nothing further is required until requested by the Human Resources Office. At that point, we may ask you to submit documentation to support statements made in your resume. For example, we may ask you to provide academic transcripts or proof of Federal employment status. If you are claiming veterans' preference, we may ask you to submit proof of veterans preference (DD-214, and, if claiming 10-point preference, SF-15 plus proof required by that form). If you fail to provide the required documents within the stated time period, we may withdraw a job offer and/or remove you from further consideration.
If you are relying on your education to meet qualification requirements:
Failure to provide all of the required information as stated in this vacancy announcement may result in an ineligible rating or may affect the overall rating.
Before you begin the application process, please read the vacancy announcement carefully and have all required information available. Failure to submit a resume that contains all of the required information may result in loss of consideration. Your application must be received no later than midnight Eastern Time on the closing date of the announcement.
You may begin the process of submitting your resume by clicking on the 'Apply Online' link. In order to be considered, you must submit a resume completed on the USAJOBS site. When completing your USAJOBS resume, please remember that NASA limits resumes to approximately 32,000 characters including spaces.
NASA does not accept uploaded resumes created outside of the USAJOBS resume builder process. Additionally, NASA does not accept documents attached through the USAJOBS' document attachment feature.
Once you submit your resume to NASA, you will be transferred to a NASA website and asked to complete a short series of NASA-specific questions. Your answers will not be saved unless you finish the entire application. You may edit a previously-submitted application, if the announcement is still open.
If you successfully apply, USAJOBS will show your application status as 'Received'. If your status is 'Unavailable', you have not successfully applied. Do not rely on a USAJOBS email to confirm successful application. Only an email from NASA confirms a successful application.
If you are unable to apply electronically for this position, submit your resume and supplemental questions to: National Aeronautics and Space Administration (NASA) 4200 Rideout Road Resume Operations Center/Mailstop: HS50 Marshall Space Flight Center, AL 35812 DO NOT submit your resume directly to the Center advertising this vacancy. Mailed resumes must be received by the close of business on the closing date of the announcement. Hard copy resumes requirements are provided at:Hard Copy Resume Requirements.
If you are a first time applicant, we recommend that you review NASA's Applicant Guide to ensure that you are providing a complete resume. Failure to submit the supplemental data and a resume that contains all of the required information may result in loss of consideration for positions. All applications must be received no later than midnight Eastern Time on the closing date of the announcement.
NASA's Resume Operations Center
4200 Rideout Road, Mailstop HS50
Marshall Space Flight Center, AL 35812
US
Next steps
Candidates for NASA positions are evaluated using our automated staffing and recruitment system, NASA STARS, which compares your skills and experience as described in your resume with the requirements of the position. If you are found to be a highly qualified candidate, you will be referred to the selecting official for further consideration. (In some cases, individuals with priority for special consideration must be considered and selected before other candidates.) Whether or not you are contacted for an interview depends upon the location of the position and the judgment of the selecting official. At NASA, we pride ourselves on efficient and timely recruitment actions, and you can normally expect to learn the outcome of the selection process in a fairly short period of time. In addition, to ensure that you can measure progress for yourself, NASA provides you with regularly updated information on the status of the vacancy announcement.
To receive consideration, you must submit a resume and answer NASA-specific questions. The NASA questions appear after you submit your resume and are transferred to the NASA web site. If you successfully apply, USAJOBS will show your application status as 'Received'. If your status is 'Application Status Not Available', you have not successfully applied. Do not rely on a USAJOBS email to confirm successful application. Only an email from NASA confirms a successful application.
Fair and transparent
The Federal hiring process is set up to be fair and transparent. Please read the following guidance.
