To our valued Leidos candidates:

Coronavirus is on everyone's mind with the effects being felt around the world. The markets are volatile, and we're all concerned for the health and safety of our families, friends, and colleagues. Please know that we're taking all necessary measures to safeguard our employees, customers and the communities in which we live, including following all recommended best practices around social distancing.

With that in mind, in an abundance of caution, we are canceling all face to face career events, such as job fairs and open house events. In the coming days and weeks, we will be hosting career events virtually, using our online chat tools so that we may continue our hiring practice safely and securely. You can find available virtual career events at

We are using telephone meetings and online chats via Brazen to conduct interviews and hiring discussions, and we are offering options for video interviews so that you can have a virtual face to face meeting with your potential new leader. We do not conduct interviews or extend offers via text or chat based social media, such as WhatsApp or MySpace.

Leidos will never ask you to provide payment-related information at any part of the employment application process, nor will Leidos ever advance money as part of the hiring process. And Leidos will communicate with you only through emails that are generated by automated system. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to Chris Scalia, Leidos’ Senior Vice President of Talent Acquisition, at [email protected].

As a company, as a country, as a world, we have confronted challenging moments before. We are confident that, guided by our values and the strength of our community as well as the commitment we have to the important work we do each day, we will find our way through this time together. We will do this with the care and concern for one another and the common good that defines. Please keep those impacted by the virus in your thoughts.

Close Window
Join our talent network
Skip to main content

Job #: R-00091227
Location: Houston, TX
Category: Aerospace Engineering
Schedule (FT/PT): Full Time
Travel Required: Yes, 10% of the time
Shift: Day
Potential for Telework: Yes, 10%
Clearance: Public Trust
Referral Eligibility: Ineligible
Group: Civil

Share: mail twitter linkedin


Job Description:

Leidos has an opening for a Python/Java Tool Suite Engineer to support the Integrated Mission Operations Contract II (IMOC II). The engineer will be assigned to the Trajectory Software group within the Flight Dynamics Division at NASA-Johnson Space Center in Houston, Texas, where they will be a member of the Platform Independent Software Components for the Exploration of Space (PISCES) Project Team.

The candidate may be requested to be on-call to provide software technical support and must be able to support a flexible work week as infrequent early morning, late evening, and weekend work may be required to support real-time launch schedules. This position is not related to flight controller certification.

Per the contract, U.S. Citizenship is required.

The PISCES Project Team is a small elite software development group responsible for developing and maintaining Java-based software tools used by the Flight Dynamics Division community. PISCES is a Java-based astrodynamics application suite with a 20+ year heritage used for shuttle, the Visiting Vehicle Office (VVO), International Space Station (ISS), Boeing Crew Space Transportation (CST), and Artemis for all phases of flight. It is also used as a library to the Mission Control Center (MCC) Trajectory Subsystem application suite for astrodynamics tools, scripts, Graphical User Interface (GUI) widgets, etc. A successful applicant needs to be equally at home using, or quick to learn, aerospace domain knowledge to develop software requirements and using programming skills to meet those requirements.

The engineer will receive training from the software users, which include flight controllers and analysts, to understand the software packages, and develop, maintain, and manage the software’s unique capabilities. The software the applicant will be responsible for supporting is used by the US Visiting Vehicle Officer (USVVO) flight controller group to perform on-orbit vehicle burn targeting and to plot the trajectory of vehicles as they approach and depart the ISS, to ensure the safety of the rendezvous/capture and release/departure operations of spacecraft delivering people and cargo to the ISS. The engineer will work with the USVVO group to determine how software capabilities are used; to develop and analyze new requirements; to design, develop, and test software code; as well as to create associated documentation, while adhering to the group’s software processes and standards.

Additionally, the engineer may also support software used by the Flight Dynamics Office (FDO) flight controller group to perform ascent trajectory verification for launches of the Space Launch System (SLS)/Orion vehicle for Artemis and Commercial Crew Boeing CST-100 missions. The employee may also support software used by the Trajectory Operations and Planning Officer (TOPO) flight controller group to support ISS Increment missions. Similar training will be provided, by working with the FDO and TOPO groups to understand user requirements and software capabilities.

As part of preparing for Artemis II (following) and Artemis III (operation) missions and beyond, the PISCES group is looking at re-architecting part of the PISCES suite of tools in Python. Experience with Python is mandatory.

Associated tools used that support the typical developer duties include the Microsoft Office Suite (Word, PowerPoint, Excel), Freeflyer, and GitLab.

Primary Responsibilities:

  • Interfacing with NASA customer daily.
  • Meeting support, which may include concisely reporting notable and actionable results to management or team. Note, in some cases facilitating one or more meetings and taking minutes.
  • Representing the PISCES Team at different NASA panels, boards, and working groups.
  • Writing and reviewing PISCES tool suite requirements, and customer and performance issues.
  • Creating and quality assuring relatable mission data products for internal and external customers.
  • Developing software requirements for and testing console situational awareness tools, data production tools, and/or analysis tools.
  • Developing training lessons.
  • Performing analysis, trade studies, running trajectory simulations and interpreting performance data. Note this may include modifying Java, Python, or Freeflyer scripts and running them in a Linux environment.
  • Making oral presentations to team peers, Flight Control Engineers, and various levels of management.

Required Education and Experience:

  • Bachelor's or Master's degree in engineering (ABET), physics, mathematics or similar technical discipline, and at least 4 years of relevant experience.
  • Beginner to intermediate experience in Java, Python, or similar software (like C++) development on either Linux or Windows-based development platforms.
  • Knowledge in the aerospace engineering domain (or quick to learn), and enjoys software development and programming in Java and Python.
  • Ability to travel, as needed (low percentage, no current requirement) to support potential related technical forums or professional conferences.

Preferred Qualifications:

  • Orbital/celestial mechanics, spacecraft flight dynamics, real-time spacecraft trajectory system design, analysis, and/or operations.
  • Education or experience with commercial off-the-shelf (COTS) tools, such as GitLab Inc. Gitlab®, MathWorks Matlab®, and/or a.i. solutions FreeFlyer®.
  • Experience with software project management and development lifecycle.

Pay Range:

Pay Range $74,750.00 - $115,000.00 - $155,250.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Covid Guidance for the US

In order to enter Leidos facilities in the U.S. and to attend Leidos events outside our facilities, employees are required to be vaccinated for COVID-19 or maintain proof of a negative COVID-19 test within 96 hours of entry. In addition, we are receiving guidance from certain customers that onsite contractor personnel will need to be fully vaccinated to access customer facilities. If you are not vaccinated, please consider getting your COVID-19 vaccination as soon as possible. If you have any questions, please contact your Talent Acquisition POC. 

About Leidos

Leidos is a Fortune 500® technology, engineering, and science solutions and services leader working to solve the world’s toughest challenges in the defense, intelligence, civil, and health markets. The company’s 44,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Virginia, Leidos reported annual revenues of approximately $13.7 billion for the fiscal year ended December 31, 2021. For more information, visit

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

Securing Your Data

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at [email protected].

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.

Commitment to Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

Apply Now    Save Job Saved

Related Opportunities

Talent Community

Join our Talent Community to create a profile, enabling a streamlined application process and to help our recruiters better understand your areas of expertise and interest.

Join our Talent Community