Applied Physicist III

Leidos Holding$87K — $157K *
Aerospace & Defense
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • BS degree with 5+ years relevant experience in applied physics or related fields; Masters with 2+ years; or PhD in physics or engineering.
  • US Citizenship and ability to maintain a Top Secret security clearance.
  • Experience with physics-based models, simulations, or scientific algorithms.
  • Strong analytical, mathematical, and problem-solving skills.
  • Fluency in scientific computing languages such as MATLAB or Python.
  • Ability to convert physical concepts into practical algorithms and analyses.
  • Proven innovation and results-oriented track record in research or engineering.

Responsibilities

  • Develop physics-based models and simulations for National Defense applications.
  • Research and evaluate innovative radar/sensor detection and data exploitation methods.
  • Apply physics and signal processing techniques for complex data extraction.
  • Conduct data analysis and model validation, including performance characterization.
  • Implement scientific algorithms efficiently using MATLAB or Python.
  • Document methodologies, results, and assumptions for various stakeholders.
  • Collaborate within a multidisciplinary team of scientists and engineers.

Benefits

  • Collaborative work environment with a talented team.
  • Opportunity to contribute to National Defense initiatives.
  • Engagement in cutting-edge research and development.
  • On-site work in a vibrant location like San Diego, CA.
Full Job Description

Primary Responsibilities

· Develop physics-based models, simulations, and analysis algorithms that support National Defense applications.

· Research, design, and evaluate innovative approaches for radar/sensor phenomenology, detection, characterization, and data exploitation.

· Apply applied physics, mathematics, and signal processing techniques to extract useful information from complex measured and simulated data sets.

· Perform data analysis, model validation, uncertainty assessment, and performance characterization for algorithms and systems.

· Create efficient implementations of scientific algorithms in MATLAB, Python, or similar high-level languages.

· Document methods, results, and assumptions clearly for technical peers, program leadership, and customers.

· Work collegially within a talented multidisciplinary team of scientists, engineers, mathematicians, and software developers.

Basic Qualifications

· BS degree with 5+ years of prior relevant applied physics, radar/sensor modeling, signal processing, data analysis, or scientific algorithm development experience; Masters with 2+ years of relevant experience; or Doctoral degree in physics, applied physics, engineering, applied mathematics, or a related scientific field.

· US Citizenship and able to maintain a Top Secret security clearance.

· Experience developing, analyzing, or validating physics-based models, simulations, or scientific algorithms.

· Excellent analytical, mathematical, and problem-solving skills.

· Fluency in MATLAB, Python, or a similar high-level scientific computing language.

· Ability to translate physical concepts into algorithms, simulations, and quantitative analyses.

· Proven track record of innovation, technical problem solving, and achieving results in a research or engineering environment.

· Strong documentation and communication skills.

· Required on-site full-time work in San Diego, CA.

Preferred Qualifications

· Understanding of radar phenomenology, electromagnetic scattering, detection, estimation, or characterization.

· Experience with modeling and simulation of physical systems, sensor systems, remote sensing, ocean/environmental phenomenology, or related data-intensive applications.

· Experience programming in C/C++ or developing efficient production-quality scientific software.

· Experience with statistical analysis, estimation theory, optimization, machine learning, or uncertainty quantification.

· Comfortable with public speaking and/or customer presentations.



Original Posting:
July 2, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:
Pay Range $87,100.00 - $157,450.00

The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

About Leidos Holding

Leidos Holding Careers

Joining Leidos Holding presents an unparalleled opportunity to advance one's career with a leader in innovation and technology. The company offers a plethora of job opportunities aimed at fostering professional growth and development in a diverse and inclusive environment.

Explore Career Opportunities

Leidos Holding is actively seeking skilled professionals who are passionate about leveraging their expertise to drive innovation and leadership in their fields. With a variety of open positions, Leidos Holding provides a platform for individuals to challenge themselves in a dynamic work environment.

Innovation and Professional Growth

At Leidos Holding, innovation is at the core of everything they do. Employees are encouraged to think creatively and push boundaries. The company supports this drive for innovation through comprehensive professional development and diversity training programs that are designed to enhance skills and foster leadership.

Commitment to Diversity and Inclusion

Leidos Holding is committed to creating a workplace where diversity is not only recognized but celebrated. With a culture that values and promotes diversity, Leidos Holding ensures that all team members have the opportunity to contribute, learn, and grow.

Internship Programs

For those starting their career, Leidos Holding offers internship programs that provide a robust foundation in the industry. Internships are a great way to develop essential skills, gain valuable work experience, and build professional networks.

Benefits and Culture

Employees at Leidos Holding enjoy a range of benefits designed to support their professional and personal lives. The company culture is built on a foundation of respect and integrity, providing a supportive and collaborative environment where every team member is valued.

Join the Team

Leidos Holding is hiring! Explore job opportunities that match your skills and interests. Leidos Holding looks for driven, curious, and innovative individuals to join their team. Positions are available across various disciplines and experience levels.

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Prepare for Your Interview

To prepare for an interview at Leidos Holding, candidates should familiarize themselves with the company's missions and values, update their resumes, and be ready to discuss how their background and skills align with the position they are applying for.

Networking and Career Advancement

Leidos Holding encourages its employees to engage in networking within the company to discover new opportunities for career advancement. The leadership team at Leidos Holding is dedicated to supporting employees in their career paths with ample opportunities for networking and growth.

Explore Leidos Holding Jobs and Careers

Discover the exciting career opportunities at Leidos Holding today. With a commitment to employee growth, innovation, and diversity, Leidos Holding is the perfect place to advance your career. Check out the latest job listings and find your perfect fit at Leidos Holding.

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