Principal Structural Engineer Plymouth, MN

At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact people's lives around the world today, and for generations to come. Our pioneering and inventive spirit has enabled us to be at the forefront of many technological advancements in our nation's history - from the first flight across the Atlantic Ocean, to stealth bombers, to landing on the moon. We look for people who have bold new ideas, courage and a pioneering spirit to join forces to invent the future, and have fun along the way. Our culture thrives on intellectual curiosity, cognitive diversity and bringing your whole self to work - and we have an insatiable drive to do what others think is impossible. Our employees are not only part of history, they're making history.

The development of smart armament systems, designed to increase the competitive advantage of our armed forces, is accelerating. This has increased the need for an analyst who has a passion for technology development, paired with demonstrated expertise in design excellence. This team member will drive to continually outperform the competition and exceed customer expectations while acting with integrity, loyalty, and respect.

As a Principal Engineer the analyst will utilize thermal and structures analysis tools to aid the Armament Systems design team with the development of smart weapons systems. Analytical support of the mechanical design process typically requires any number of finite element analysis approaches. The candidate shall be able to assess the design problem, work with the Subject Matter Expert to formulate an analysis approach and utilize a suite of tools to aid in the design development. Any number of solution types such as static structural and other implicit dynamic solution types such as modal, harmonic, spectrum and random vibration, may be required to support the entire design life cycle.

In addition to structural analysis, thermal loads often need to be considered. The thermal loading can have a variety of sources including electronic components, aero heating from hypersonic ballistic applications. Performing or assisting the aero-heating analysis with CFD tools is desired.

Experience with metallic and conventional molded plastic materials and knowledge of molded and wound fiber reinforced plastics and their modeling would be a desired. Reinforced plastic analysis experience with application to printed circuit boards a plus.


  • Work with our Subject Matter Experts to develop a finite element analysis approach and solution to our thermal and structural problems based upon an understanding of the technical principals and determine the analysis type and tools required to evaluate a wide variety of numerical modeling problems which utilize a variety of materials including composites.

  • Required workflow includes the development of structural models, meshing, selection of boundary conditions and constraints, selection of applicable material properties, selection of proper simulation code and methodology, interpretation of analytical results, and recommendation for design improvements.

  • Support innovation by applying the most effective analysis technology to new smart munition product development.

  • Become part of the product team and form close working relationships by understanding the whole system function and presenting solutions and design direction to the design community in an insightful and timely manner.


  • Bachelor's degree in mechanical or aerospace engineering.

  • Minimum of 5 years of experience with BS, or 3 years of experience with MS, or 0 years with PhD.

  • Steady state and transient thermal analysis using ANSYS.

  • Linear and non-linear implicit, static and time dependent FEA using ANSYS or ABAQUS.

  • U.S. citizen and possess or qualify for a U.S. Government security clearance.


  • Thermal analysis of electronic enclosures and assemblies using ANSYS Icepak or similar tools.

  • Thermal and power dissipation analysis of printed circuit card assemblies.

  • Aerothermal heating analysis of flight vehicles.

  • Use of CFD tools to determine the aerothermal heating parameters to use in subsequent aerothermal flight vehicle analysis.

  • Linear and non-linear explicit, time dependent structural FEA.

  • Fiber reinforced composite component finite element analysis.

Salary Range: $99,800 - $149,800

Employees may be eligible for a discretionary bonus in addition to base pay. Annual bonuses are designed to reward individual contributions as well as allow employees to share in company results. Employees in Vice President or Director positions may be eligible for Long Term Incentives. In addition, Northrop Grumman provides a variety of benefits including health insurance coverage, life and disability insurance, savings plan, Company paid holidays and paid time off (PTO) for vacation and/or personal business.

Northrop Grumman is committed to hiring and retaining a diverse workforce. We are proud to be an Equal Opportunity/Affirmative Action Employer, making decisions without regard to race, color, religion, creed, sex, sexual orientation, gender identity, marital status, national origin, age, veteran status, disability, or any other protected class. For our complete EEO/AA and Pay Transparency statement, please visit . U.S. Citizenship is required for most positions.