Office of the Deputy Director for Engineering (DD, ENG) Mission

Propagate Engineering Best Practices

Solve Engineering Problems

Connect the Engineering Community

The Office of the Deputy Director for Engineering seeks to streamline, develop, and align engineering practice across the Department of Defense to more rapidly provide capability to a modernized warfighting force.


Acting Deputy Director for Engineering (DD, ENG) Stephanie L. Possehl

Ms. Stephanie Possehl is the Acting Deputy Director for Engineering within the Office of the Under Secretary of Defense for Research and Engineering. She serves as the DoD’s Chief Engineer for Advanced Capabilities. She leads mission engineering and test and evaluation policy, guidance, and standards. She leads the DoD engineering workforce, guiding communities of engineers from across DoD to advance engineering techniques in areas including digital engineering, reliability and maintainability, modeling and simulation, software, manufacturing and quality, human systems integration, and modular open systems approach.


Developmental Test, Evaluation, and Assessments (DTEA) Director, DTEA: Mr. Christopher Collins

Mission: Provide systems engineering and test and evaluation support to DoD Adaptive Acquisition Framework programs and Research and Engineering modernization priorities to ensure systems and solutions meet requirements.

Engineering Policy and Systems (EPS) Director, EPS: Ms. Stephanie Possehl

Mission: Provide the foundation for Department of Defense systems engineering.

Mission Integration (MI) Director, MI: Mr. Elmer Roman

Mission: Inform requirements, programs, and investment decisions toward more integrated, mission-focused, threat-informed solutions based on technical analyses and architectures.

Strategic Intelligence and Analysis Cell (SIAC) Director, SIAC: Mr. Eric Kim (Acting)

Mission: Provide analytic support to the Department’s modernization efforts by delivering threat informed, operationally relevant analysis on technical capability development for Joint Force cross-cutting mission areas in a rapidly evolving global technology environment.

Joint Hypersonics Transition Office Director, JHTO: Dr. Gillian Bussey

Mission: Accelerate hypersonics technology development and transition to advanced capability


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Directorate of Defense Research and
Engineering for Advanced Capabilities
The Pentagon, Washington, DC 20301