---
title: 'Principal Signal Processing Engineer at STR'
canonical: 'https://feeny.ai/job/principal-signal-processing-engineer-str-woburn-04mcvk8rmk5p'
type: 'job'
last_seen: '2026-09-11'
---

# Principal Signal Processing Engineer at STR

- **Company:** STR
- **Location:** Woburn, MA
- **Posted:** 2026-08-06
- **Last confirmed live:** 2026-09-11
- **Apply:** https://job-boards.greenhouse.io/systemstechnologyresearch/jobs/4702805006

## Job description

## About the Team

STR’s Space Missions and Sensing (SMS) Sector’s mission is to develop and apply innovative technology to space-based sensing, space control, and counter-sensing. Within the SMS Sector, the Space and Counter Space (SCS) team is at the forefront in electronic warfare technologies.  Our team strives to bring critical and transformational capabilities to the warfighter through creative ideas and techniques.  To realize the value, the team develops both engineering and operational prototypes to demonstrate capabilities in real world environments.

STR takes pride in our ability to address warfighter operational needs. Our core team includes principal investigators, program managers, signal processors, SW developers, FPGA expertise, RF and Electromagnetic engineers, and mechanical design experts.  Our facilities support on site build and test (benchtop, anechoic chamber, and over the air).  We collaborate with a dynamic group of research engineers across STR, academic researchers, and industry partners to develop practical and effective solutions to RF sensing and counter-sensing challenges.

The Role:

As a Principal Algorithm & Signal Processing Researcher, you will develop and apply state-of-the-art algorithms and techniques for signal detection, classification, autonomous sensor planning, and radar electronic warfare.  You'll engage directly with our customers to understand and address their most critical challenges. You'll lead a team of researchers in creating innovative system capability and collaborate with the engineering team to develop and demonstrate and optimize over the air state-or-the-art system capabilities.

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
- Design and apply cutting-edge signal processing and machine learning techniques to solve complex radar and RF sensing and counter-sensing challenges
- Collaborate with diverse teams, bringing together different perspectives to develop and deploy prototype systems that demonstrate our ability to extend the boundaries of what's possible
- Lead and inspire multi-disciplinary teams, guiding them towards success with your technical expertise and leadership skills
- Drive business development initiatives and support proposal writing efforts, playing a key role in shaping the future direction of our projects and organization

Who You Are:

- Ability to obtain a Top Secret security clearance, for which U.S. citizenship is needed by U.S. Government.
- PhD, MS, or BS in Electrical Engineering, Applied Mathematics, Physics, or related technical discipline
- 8+ years of 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
- 2+ years experience in two or more of the following areas:
- RF/radar signal processing, optimization, waveform design, electronic warfare, machine learning, adaptive signal processing, algorithm development, system model & simulation, and systems engineering
- Experienced in translating system capabilities into subsystem requirements.
- 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 with ability to develop and tailor technical briefs to a range of audiences including subcontractors, senior level executives, and customers
- Proficiency in in one or more scientific or mathematical programming languages, such as MATLAB, Python, and C/C++
- 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
- Advanced degree in Electrical Engineering, Applied Mathematics, Physics, or a related technical discipline
- 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, 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.

Pay Information Full-Time Salary Range: $206,000 - $284,000

The salary range listed is based on external market data. Offers are based on factors, such as but not limited to, the candidate’s experience, education, training, key skills/critical skills, security clearances, and prevailing market and business conditions. STR is a growing technology company with locations near Boston, MA, Arlington, VA, near Dayton, OH, Melbourne, FL, Carlsbad, CA, Atlanta, GA, and Denver, CO. 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 [www.str.us](http://www.str.us/) 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 appassist@str.us 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.

## About STR

## Company Overview
- **One-liner**: STR (Systems & Technology Research) develops and applies advanced technology to solve emerging national security challenges for the U.S. Department of Defense and intelligence community.
- **Entity Type**: Private (employee-owned)
- **Headquarters**: Woburn, Massachusetts, United States
- **Founded**: 2010
- **Founders**: Not publicly available

## Core Business
- **Primary industry/industries**: National security technology, defense, cybersecurity, sensing, analytics, systems engineering
- **Target customers**: U.S. Department of Defense, intelligence community, government agencies (B2G)
- **Mission or purpose statement**: “Making the world a safer place” by delivering high-impact technology solutions to the nation’s hardest problems.

## Products & Services
- **Cyber**: Applies reverse engineering, vulnerability assessment, formal methods, and AI/ML to solve critical cybersecurity and operational problems for the DoD.
- **Sensors**: Develops hardware and algorithm prototypes for radar, underwater acoustics, electronic warfare, and advanced RF/EOIR sensing concepts.
- **Analytics & C2**: Transforms information into advantage through command & control, autonomous systems, machine learning, graph analytics, and data visualization.
- **Systems Development**: Delivers resilient, high-impact capabilities at scale using model-based systems engineering, DevSecOps, and mission-focused integration.

## Market Standing
- **Valuation/Market Cap**: Not disclosed (private company)
- **Key Metric**: Annual Revenue $100M–$500M (LinkedIn estimate)
- **Notable Investors/Partners**: Employee-owned; primary customer is the U.S. Department of Defense. Key talent sources include Leidos, L3Harris, BAE Systems, MITRE, RTX, Draper, and MIT Lincoln Laboratory.
- **Growth Signals**: Headcount grew 15% YoY (644 employees); active job postings increased 155.8% year-over-year (133 current openings); operates 7 U.S. offices.

## Competitive Advantages
- **Employee-owned structure** aligns incentives with long-term mission impact rather than short-term returns.
- **Multi-disciplinary expertise** spanning cyber, sensors, analytics, and systems engineering enables integrated solutions.
- **“The STR Triangle”** – combines world‑renowned researchers, growing talent, and skilled engineers to rapidly mature ideas into fielded capabilities.
- **Meeting‑free Fridays** and flexible schedules support deep technical work and work‑life balance.

## Strategic Focus
- Continue to solve emerging national security challenges by investing in AI/ML, autonomous systems, cyber resilience, and advanced sensing.
- Scale delivery through model‑based systems engineering and DevSecOps practices.
- Attract and retain top technical talent by fostering a culture of purpose, diversity, and professional growth.

## Why Work Here
- **Culture**: “Choose‑your‑own‑adventure” career model – employees can pursue research, product development, engineering, or management paths. Emphasis on unconventional thinking, diverse perspectives, and real impact.
- **Remote/Hybrid**: Some roles are remote (e.g., Lead Mission Engineer Full Stack); most positions are on‑site at one of seven U.S. locations (Woburn MA, Arlington VA, Dayton OH, Carlsbad CA, Palm Bay FL, San Diego CA, Melbourne FL).
- **Notable perks**: Great health/dental/vision coverage, generous 401k matching, tuition reimbursement, results‑based bonuses, active interest groups, social events, snacks & coffee. Interns focus on real‑world problems, not busy work.
- **Engineering culture**: Strong mentorship, collaboration with national security experts, and opportunities to work on cutting‑edge technology from research through deployment.

## Sources
1. [str.us](https://str.us/)
2. [str.us/careers](https://str.us/careers/)
3. [str.us/life-at-str](https://str.us/life-at-str/)
4. [job-boards.greenhouse.io/systemstechnologyresearch](http://job-boards.greenhouse.io/systemstechnologyresearch)
5. [linkedin.com/company/str-us](https://www.linkedin.com/company/str-us)

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