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Working at Lockheed Martin

Sr Mass Properties Engineer

King of Prussia, Pennsylvania

King of Prussia, Pennsylvania

Job Responsibilities

Job ID: 719021BR Date posted: Feb. 25, 2026
Description:Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more — we can innovate, invest, inspire and integrate our capabilities to transform the future.

At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security® vision. We’re erasing boundaries and forming partnerships across industries and around the world. We’re advancing spacecraft and the workforce to fuel the next generation. And we’re reimagining how space can connect us, ensuring security and prosperity.
For over 60 years, the Fleet Ballistic Missile (FBM) team has supported the Navy’s mission to provide affordable and credible strategic defense. We offer unique career opportunities and challenges on a program with a rich history and exciting future. We help keep this nation and our allies secure. The FBM Program is experiencing significant growth, and we need your expertise to deliver amazing new technologies to our customers while maintaining the technical requirements of the strategic deterrence.

Join us in shaping a new era in space and find a career that's built for you.

Mass Properties Engineering is the art and science of predicting the Mass Properties of a satellite, missile, aircraft, land vehicle or marine system before it is built, assessing and supervising the Mass Properties all through development, and finally performing highly accurate measurements to prove to our customers it will perform as proposed. Our Mass Properties Engineers help ensure our spacecraft get payloads to the right orbit around our planet or around other objects in our solar system, help our missile systems intercept a threat and protect our troops, help deliver a payload with pinpoint accuracy, or help us develop smaller, lightweight directed energy weapons, so they can be deployed on a variety of platforms.

As a Mass Properties Engineer, you will be:
• Providing Mass Properties Engineering support to multiple missile, reentry, or special programs
• Working in a collaborative environment with junior and other senior Mass Properties engineers
• Providing technical guidance to program management, peers in other disciplines, and customers to ensure successful program performance
• Performing Mass Properties analyses and measurements
• Leading Mass Properties control and management efforts
• Coaching, mentoring, and training junior engineers in Mass Properties analysis, verification, and control
• Acting as a technical consultant to customers within the company
• Developing new and inventive Mass Properties tools and techniques in analysis, verification, and control
Basic Qualifications:
• Technical expertise in sophisticated Mass Properties analysis, including identification and quantification of error sources in accuracy and uncertainty analysis
• Ability to perform coordinate system transformations
• Proficiency in calculating the Mass Properties (mass, 3 axis centers of gravity, moments and products of inertia) of components and performing summation calculations into assemblies; developing simple software tools to perform these calculations
• Experience with performing Mass Properties analysis to resolve weight, center of gravity, mass moments of inertia, and products of inertia from assemblies down to the component level; tracking changes impacting Mass Properties; preparing Mass Properties reports and supporting design reviews
• Ability to Interpret detailed mechanism designs taken from manufacturing drawings or standard modeling software tools
• Demonstrated experience in weight and center of gravity measurements by platform and multiple load cell methods, data reduction, and simple error analysis
US Citizenship with the ability to obtain and maintain a Top Secret security clearance
Desired Skills:
• Bachelor's degree in Engineering (Mechanical, Aerospace), Physics, or Mathematics
• Demonstrated understanding of and interactions of Mass Properties with other mechanical analysis groups including Stress, Structural Loads and Dynamics, Thermodynamics, Aerodynamics, NG&C, Ground Support Equipment, Propulsion and Power Systems, as well as subsystem designers to promote Mass Properties efficient design alternatives
• Experience performing Mass Properties measurements using rotary-type spin balance machine; ability to interpret results and dynamically balance the test object within requirements
• Experience with the responsibility of supporting and being the primary Mass Properties point of contact for a program or project
• Ability to multitask; self-starter who strives for a positive customer experience
• Experience with configuration assessment and prediction of Mass Properties based on preliminary design models as well as the evolving released design
• Demonstrated proficiency with Microsoft Word, Excel and Power Point, solid modeling applications (IDEAS, Pro-E, or CREO), Mathcad and/or MATLAB, MassTrack/ShipWeight, and an understanding of other software analysis tools
• Experience with leading and mentoring junior engineers
• Ability to identify and resolve technical concerns related to Mass Properties
• Familiarity with developing test procedures and performing data reduction
• Experience with spin balance test fixturing
• Ability to document Mass Properties procedures, practices and/or specifications
• Experience working on integrated product teams and interacting with other engineering fields, technicians, subcontractors, and customers
• Familiarity with manufacturing and assembly techniques and processes
• Demonstrated behaviors of a systems thinker with the ability to select and apply appropriate systems thinking skills to solve problems and implement constructive changes
• Missile or space segment design and test experience with one or more subsystems or fields outside of Mass Properties engineering
• Excellent written and verbal communications skills, strong social skills, and ability to build consensus among peers while building solid relationships with team members
• Active Secret/Top Secret clearance
Security Clearance Statement: This position requires a government security clearance, you must be a US Citizen for consideration.
Clearance Level: Top Secret
Other Important Information You Should Know
Expression of Interest: By applying to this job, you are expressing interest in this position and could be considered for other career opportunities where similar skills and requirements have been identified as a match. Should this match be identified you may be contacted for this and future openings.
Ability to Work Remotely: Onsite Full-time: The work associated with this position will be performed onsite at a designated Lockheed Martin facility.
Work Schedules: Lockheed Martin supports a variety of alternate work schedules that provide additional flexibility to our employees. Schedules range from standard 40 hours over a five day work week while others may be condensed. These condensed schedules provide employees with additional time away from the office and are in addition to our Paid Time off benefits.
Schedule for this Position: 9x80 every other Friday off
Lockheed Martin is an equal opportunity employer. Qualified candidates will be considered without regard to legally protected characteristics.
The application window will close in 90 days; applicants are encouraged to apply within 5 - 30 days of the requisition posting date in order to receive optimal consideration.
At Lockheed Martin, we use our passion for purposeful innovation to help keep people safe and solve the world's most complex challenges. Our people are some of the greatest minds in the industry and truly make Lockheed Martin a great place to work.

With our employees as our priority, we provide diverse career opportunities designed to propel, develop, and boost agility. Our flexible schedules, competitive pay, and comprehensive benefits enable our employees to live a healthy, fulfilling life at and outside of work. We place an emphasis on empowering our employees by fostering an inclusive environment built upon integrity and corporate responsibility.

If this sounds like a culture you connect with, you’re invited to apply for this role. Or, if you are unsure whether your experience aligns with the requirements of this position, we encourage you to search on Lockheed Martin Jobs, and apply for roles that align with your qualifications.
Experience Level: Experienced Professional
Business Unit: SPACE
Relocation Available: Possible
Career Area: Mechanical Engineering
Type: Full-Time
Shift: First
Apply Now

About

At Lockheed Martin, we apply our passion for purposeful innovation to keep people safe and solve the world's most complex challenges.

Pioneering Defense Technology: From aerospace to outer space to cyber space, you can innovate mission solutions alongside the best minds in the business.

United By Culture: Excellence, integrity, and collaboration define us. We accelerate change and embrace one another’s perspectives to win for our customers.

Real Impact, Real Growth: Grow your career and skills for life. Our wide array of opportunities and technology-driven learning programs enable your development and agility.

Your Health, Your Wealth, Your Life: Competitive pay, comprehensive benefits and flexible schedules designed so you thrive — at work and beyond.

Empowered to Be Your Best: Use your strengths to make a difference in the lives of one another, our customers, our communities, and our planet.

Here, the possibilities are endless because we offer:

  • Flexible Schedules, dependent on role
  • Levels: Student, Entry, Mid, Senior, Management
  • Locations: Nationwide & OCONUS Positions

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Qualifications

See what it takes to be a successful Lockheed Martin employee.

  • Collaborative

    There is no innovation without imagination. You bring new, different and exciting ideas to the table every day. You are committed to the success of your team.

  • Curious

    The ability to explore and drive new ideas. You think innovatively to come up with creative solutions to complex challenges.

  • Goal-oriented

    From planning and organizing to decision making, goal orientation produces impactful results. You set goals and strive to make things happen quickly and efficiently.

  • Proactive

    The ability to anticipate, plan and prepare for what lies ahead. You act rather than react to potential situations.

  • Problem Solver

    You work to tackle tough problems with complex solutions.

  • Strategic

    You observe, reflect and analyze processes to make more informed decisions.

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Quote

“Before I came to Lockheed Martin, I never thought I’d get these opportunities. The benefits available and the company’s value culture make it an incredibly supportive place to work, and I’m grateful to work somewhere that wants me to succeed. I hope to have a long career here making an impact, and I know I’ll be supported in doing that every step of the way.”

Ryan J., Enterprise Operations

Benefits

  • Healthcare

    Medical, Dental and Vision coverage is available for employees who opt-in.

  • 401(k)/Retirement Plans

    Our 401(k) plan features generous matching and company contributions.

  • Professional Development

    We support our employees through mentoring, internal & external educational programs, networking, skills enhancement and career-building programs.

  • Maternity and Paternity Leave

    Our generous parental leave policies support your journey into parenthood. When you return to work, our facilities offer mother's rooms to support your transition and work/life balance.

  • Paid Time Off

    We offer PTO, paid holidays and paid time off for jury duty and military obligations.

  • Flex-time

    Depending on the position, we offer flexible work schedules.

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