LEIDOS currently has an opening for a Senior Liquid Rocket Propulsion SME working on-site at a customer location in Northern Virginia. This position is part of a team of Subject Matter Experts providing analytic expertise in the area of launch vehicle and missile analyses, satellite technology and C4ISR. The ideal candidate would have industrial experience the design, development, testing and deployment of liquid propulsion systems for launch vehicles and/or missiles. Primary Responsibilities. In addition to the clearance requirement, successful candidates will demonstrate proficiency in all aspects of liquid propellant rocket motors for use in military systems. Industrial experience developing and modeling liquid rocket engines, turbo pumps, and control systems. Familiarity with propellant formulations, modeling formulations, and modeling motor performance. Experience with liquid propellant rocket engine manufacturing methods, tooling, procedures, and testing. Must have the ability to teach courses on liquid propellant rocket fundamentals, modeling, and manufacturing requirements. Must be willing to work with junior colleagues to mentor them. Basic Qualifications. The position requires a Bachelor’s Degree and 15+ years of experience or a Master's Degree and 13+ years experience. At least 12+ years related to liquid rocket propulsion is required. Must possess at least a Secret security clearance (higher preferred) and have the ability to be able to obtain a TS/SCI with polygraph clearance. Must have a valid US passport. Preferred Qualifications. Knowledge of foreign liquid propellant propulsion systems. Propellant experience with military systems. An advanced degree is preferred. Current TS/SCI with polygraph clearance. 15-20 years of experience a plus. If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares. Original Posting: July 21, 2025 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. Pay Range: Pay Range $139,100.00 - $251,450.00 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.