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Leidos addresses some of the nation's toughest defense challenges through innovative signal processing and data analytics. Our San Diego-based team consists of highly skilled scientists and engineers focused on extracting maximum intelligence from complex datasets derived from diverse sensing modalities. We seek a talented Modeling and Simulation Engineer who thrives in algorithm research, development, and implementation. The ideal candidate is creative, efficient, collaborates well, and is passionate about bringing solutions from concept to delivery. Leidos is an employee-friendly company with a competitive benefit package, flexible working hours, and a collegial atmosphere.
Primary Responsibilities
On a day-to-day basis, responsible for:
Algorithm development,
Software design, and
Data analysis.
Modeling real world systems in simulation for SWIL/HWIL testing.
Basic Qualifications
BS degree in physics with 4-8 years of relevant experience, or Masters with 2-6 years of relevant experience, or Doctoral degree if less than 2 years of experience
Strong background in Aerospace, Math, and/or Physics
Strong knowledge of programming and modeling and simulation applications (Python, C++, RUST, etc.)
An ability to obtain and maintain a Clearance
The ideal candidate will have 3-5 years of experience, though candidates with 0-2 years of experience are welcome
Experience with C/C++ programming languages (object oriented).
Experience with collaborative development with other team members
US CItizenship with the ability to obtain Top Secret security clearance
Required on-site full-time work in San Diego, CA
Ideally knowledgeable in astrodynamics
An ability to obtain and maintain a TS/SCI Clearance
An advanced degree (M.S./Ph.D)
Experience developing and testing algorithms for processing real-world image or radar data
Experience with wave physics (RF, acoustic, optical)
subseamss
If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.
Original Posting:
February 9, 2026For 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 - $157,450.00The Leidos pay range for this job level is a general guideline only and 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.
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About Leidos

Leidos
PublicProvides scientific, engineering, systems integration, and technical services.
10,001+
Employees
Reston
Headquarters
Reviews
3.8
9 reviews
Work Life Balance
4.2
Compensation
3.8
Culture
4.1
Career
3.2
Management
4.0
72%
Recommend to a Friend
Pros
Great management and managers
Good work-life balance
Excellent culture and team environment
Cons
Limited promotion opportunities
Feeling underpaid at mid-levels
Red tape and bureaucracy
Salary Ranges
26 data points
Junior/L3
Junior/L3 · Energy Market Analyst
1 reports
$112,700
total / year
Base
$98,000
Stock
-
Bonus
-
$112,700
$112,700
Interview Experience
3 interviews
Difficulty
3.0
/ 5
Duration
14-28 weeks
Offer Rate
67%
Experience
Positive 67%
Neutral 0%
Negative 33%
Interview Process
1
Application Review
2
Recruiter Screen
3
Technical Phone Screen
4
Hiring Manager Interview
5
Team Interview
6
Offer
Common Questions
Technical Knowledge
Behavioral/STAR
Past Experience
Security Clearance
Government Contract Experience
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