Principal Algorithm & Signal Processing Engineer

Str
Arlington, VA

The Team:

The Electronic Warfare and Novel Capabilities Group (EWNC) develops and delivers advanced signal processing algorithms and prototype systems for next-generation radar and electronic warfare technologies.

EWNC fosters a culture of innovation and collaboration. We investigate cutting edge technologies and interface with engineers across sectors and divisions at STR and researchers at academic institutions and industry partners to develop practical and effective solutions to RF sensing and counter-sensing challenges. If you're seeking an opportunity to apply your deep technical knowledge and creativity to make a lasting impact, we invite you to join us.

The Role:

We are looking for a Principal Engineer to develop state-of-the-art algorithms and techniques for sense making and sensor decision making, from signal detection and classification, to electronic support measures, attack, and protection, to cognitive EW and more. You will lead projects and proposal efforts, lead and advise fellow researchers, scientists, and engineers on multi-disciplinary teams spread across multiple STR campuses. You will seek to understand customer missions, and in turn, construct proposal and program plans to meet their current and future needs. 

What you will do: 


  • Engage directly with customers to understand their unique requirements and national security needs, and shape our solutions to meet their objectives

  • Lead projects and multi-disciplinary teams

  • Design and apply cutting-edge signal processing and machine learning techniques to solve complex radar and RF sensing and counter-sensing challenges 

  • Support business development initiatives and lead writing efforts, playing a key role in shaping the future direction of our projects and organization

Who You Are: 


  • This position requires the ability to obtain a security clearance, for which U.S. citizenship is needed by U.S. Government.

  • BS, MS, or PhD in Electrical Engineering, Applied Mathematics, Physics, or related technical discipline

  • 5-10+ years of relevant work experience depending on degree (PhD +5 years or BS +10 years)

  • Experience on EW or Radar programs, including the development of sensor system modes and advanced signal- and data-processing algorithms from mathematical/analytical derivation through testing and verification of system performance

  • Expertise in two or more of the following areas:

    • RF/radar signal processing, optimization, waveform design, electronic warfare, machine learning, adaptive signal processing, AI/ML algorithm development, algorithm development, model & simulation, systems engineering, test engineering, radar modelling, or RF systems prototyping


  • Experience providing technical briefs to subcontractors, senior level executives, and customers

  • Proficiency in one or more scientific or mathematical programming languages, such as MATLAB, Python, and C/C++

  • Experienced researcher and team member who is excited to work with mission partners to leverage cutting-edge technology and research for immediate impact

  • Excellent communicator and briefer, who is comfortable communicating with both technical and non-technical audiences

  • Strong mathematical, troubleshooting, written, and verbal communication skills

Even Better: 


  • Active Secret or TS/SCI Clearance

  • Demonstrated leadership of complex research, development, and engineering efforts     

  • Experience with:

    • Radar and RF technologies in the defense sector, particularly for RF sensing and electronic warfare applications including electronic attack, electronic protection, cognitive EW, radar signal processing, optimization, and advanced ESM techniques and algorithms 

    • Machine learning tasks such as natural language processing, image recognition, semantic segmentation, reinforcement learning, approaches such as Bayesian, deep convolutional and graph neural network methods, and tools such as PyTorch, Ray, TensorFlow/board, and MLflow   

    • Interacting with decision-makers and customers to translate mission needs into an end-to-end solution   


  • Ability to apply novel, innovative and interdisciplinary approaches to challenging engineering problems  

Join us and be part of a team that's making an impact at the forefront of technology and innovation. While this position is ideally suited for a principal engineer, individuals that feel they meet most of the requirements are encouraged to apply. We have opportunities for talented engineers at all experience levels in Woburn, MA or Dayton, OH.

STR is a growing technology company with locations near Boston, MA, Arlington, VA, near Dayton, OH, Melbourne, FL, and Carlsbad, CA. We specialize in advanced research and development for defense, intelligence, and national security in: cyber; next generation sensors, radar, sonar, communications, and electronic warfare; and artificial intelligence algorithms and analytics to make sense of the complexity that is exploding around us.

STR is committed to creating a collaborative learning environment that supports deep technical understanding and recognizes the contributions and achievements of all team members. Our work is challenging, and we go home at night knowing that we pushed the envelope of technology and made the world safer.

STR is not just any company. Our people, culture, and attitude along with their unique set of skills, experiences, and perspectives put us on a trajectory to change the world. We can't do it alone, though - we need fellow trailblazers. If you are one, join our team and help to keep our society safe! Visit us at for more info.


STR is an equal opportunity employer. We are fully dedicated to hiring the most qualified candidate regardless of race, color, religion, sex (including gender identity, sexual orientation and pregnancy), marital status, national origin, age, veteran status, disability, genetic information or any other characteristic protected by federal, state or local laws.

If you need a reasonable accommodation for any portion of the employment process, email us at [email protected] and provide your contact info.

Pursuant to applicable federal law and regulations, positions at STR require employees to obtain national security clearances and satisfy the requirements for compliance with export control and other applicable laws.

Posted 2025-09-22

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