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Principal Applied Scientist - TS/SCI

Herndon, VA Full-time On-site $140k — $205.7k per year 09/11/2026 Job ID: 000170
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computational modeling simulation applied mathematics physics data science

Summary

What you’ll impact

Our organization is seeking a Principal Applied Scientist to lead the development, validation, and application of advanced computational models and simulations for Ubiquitous Technical Surveillance (UTS) environments. The role involves creating high-fidelity agent-based models, integrating machine-learning features, and delivering a transition-ready risk-management capability to improve mission survivability for joint forces.

Responsibilities

What you'll do

  • Serve as the scientific lead for computational modeling and simulation activities across the program.
  • Establish scientifically rigorous methodologies for representing UTS phenomena within analytical and simulation environments.
  • Ensure analytical approaches accurately reflect the underlying physical, operational, and statistical characteristics of the data.
  • Design, develop, and validate complex agent-based models representing UTS interactions and operational environments.
  • Develop agent behaviors, environmental conditions, interaction rules, and emergent system dynamics
  • Evaluate simulation outputs for realism, repeatability, and operational relevance.
  • Evaluate government-provided datasets to identify meaningful physical, temporal, behavioral, and operational relationships.
  • Develop scientifically valid approaches for feature engineering and diagnostic vector identification.
  • Collaborate with data scientists to ensure machine learning models leverage meaningful scientific features rather than spurious correlations.
  • Assess the quality, completeness, and limitations of available data.
  • Apply statistical, probabilistic, and computational methods to characterize uncertainty and system behavior.

Requirements

What you’ll bring

  • US Citizen and must have an active TS/SCI clearance, with ability to obtain CI Poly.
  • 12+ years of relevant experience.
  • Master's or PhD in physics, mathematics, statistics, operations research, engineering, science, or related discipline.
  • Strong technical leadership experience.
  • Extensive demonstrated knowledge and experience utilizing the following modeling techniques: process, predictive, physics-based, agent-based.
  • Significant current experience (i.e., within last 2 years) in modeling, using statistics to conduct predictive modeling and make estimates on future occurrences based on prior events, and using physics-based modeling to review sensor capabilities and predict sensor ability to perform tasks in a synthetic scenario
  • Experience working with diverse data sets from UTS relevant sources
  • Proficiency in Python and scientific computing libraries.
  • Experience AI/ML programs.
  • Ability to clearly communicate technical concepts and analytical results in writing and verbally.
  • Must be able to work on-site in Herndon, Va.
  • Experience with agent-based modeling.
  • Experience supporting operational environments and/or Government R&D projects.
  • published modeling reports and/or authored new procedures/methods to create innovative modeling approaches to solve complex issues
  • Experience modeling human behavior, adversarial systems, or complex adaptive systems.
  • Experience with reinforcement learning, Bayesian inference, Monte Carlo methods, or stochastic simulation.
  • Familiarity with explainable AI (XAI) and integrating scientific principles into machine learning workflows.
  • Experience developing digital twins or high-fidelity operational simulations.
  • Experience supporting personnel recovery, force protection, intelligence analysis, or mission planning.

Ready to Move Forward?

Apply now and our recruiting team will reach out with next steps, interview guidance, and client insights tailored to this role.