Senior Data Scientist

Leidos Inc; Chantilly (VA); On-site; USD 154,050 - 278,475; Full time

Benefits offered by this job

Health and Wellness programs

Paid Leave

Retirement benefits

Job summary

A leading defense technology company is seeking a Senior Data Scientist to provide technical leadership and advanced analytics support for national security programs. The role involves leading complex analytics projects, defining mission problems, and deploying machine learning solutions. Candidates must have a Master's degree in a relevant field and extensive experience in data science, alongside an active TS/SCI clearance. This position offers a competitive salary range of $154,050 to $278,475.

Qualifications

• Master's degree in Data Science or related quantitative field with 15+ years of experience.
• Experience applying data science and analytics to complex problems.
• Must hold an active TS/SCI clearance with Polygraph.

Responsibilities

• Lead complex analytics efforts in national security programs.
• Define mission problems and analytic objectives with customers.
• Design and deploy advanced analytics and machine learning solutions.

Skills

Expert-level proficiency in Python

Advanced data science libraries

Data analysis

Machine learning

Strong communication skills

Education

Master's degree in Data Science or related field

Tools

R

Statistical software

Job description

Leidos is seeking a Senior Data Scientist to provide technical leadership and advanced analytics expertise in support of mission‑critical national security programs. This role supports customers operating in classified environments and requires close collaboration with subject matter experts, designers, engineers, analysts, and mission stakeholders to deliver innovative, operationally relevant data science and AI solutions.

The Senior Data Scientist will lead complex analytics efforts across the full solution lifecycle—from problem definition and requirements development through design, implementation, deployment, and ongoing operations and maintenance (O&M). The ideal candidate brings deep technical expertise, strong mission awareness, and the ability to communicate analytic insights to senior decision‑makers.

Primary Responsibilities

• Serve as a senior technical contributor and analytic lead on complex, high‑impact national security programs
• Partner with government customers and subject matter experts to define mission problems and analytic objectives
• Translate ambiguous operational challenges into actionable data science requirements and solution designs
• Design, develop, and deploy advanced analytics, statistical models, and machine learning solutions
• Apply advanced data science techniques including exploratory data analysis, feature engineering, predictive modeling, hypothesis testing, and algorithm development
• Integrate structured and unstructured data from diverse sources across classified environments
• Communicate analytic findings, insights, and recommendations to senior technical and non‑technical stakeholders
• Support deployment, monitoring, and ongoing operations and maintenance (O&M) of analytic solutions
• Mentor and guide junior data scientists and contribute to analytic standards, best practices, and reusable frameworks
• Maintain awareness of emerging data science, AI, and big‑data technologies relevant to national security missions

Basic Qualifications

• Master's degree in Data Science, Computer Science, Statistics, Mathematics, Engineering, or a related quantitative field with 15+ years of relevant experience, or Bachelor's degree with 18+ years of relevant experience
• Extensive experience applying data science and advanced analytics to complex, mission‑focused problems
• Expert‑level proficiency in Python and/or R, including advanced data science and machine learning libraries
• Strong experience working with large, complex datasets from multiple sources
• Demonstrated ability to lead technical efforts and influence analytic direction on large or complex programs
• Strong written and verbal communication skills, including briefing senior leaders
• Must hold an active TS/SCI clearance with Polygraph

Preferred Qualifications

• Experience supporting intelligence community, Department of Defense, or other national security customers
• Experience operating in classified computing environments
• Expertise in one or more advanced domains such as machine learning, natural language processing, computer vision, graph analytics, or predictive modeling
• Experience with cloud‑based or enterprise analytics platforms
• Demonstrated experience mentoring technical staff or serving as a technical lead
• Demonstrated experience providing instruction, instructional design, or curriculum development

Clearance Requirement

Active TS/SCI with Polygraph

Original posting: January 14, 2026. The 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.

Pay Range: $154,050.00 – $278,475.00. The 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 responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, market data, and applicable agreements.

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That’s why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

Securing Your Data

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment‑related information during any part of the employment application process. Leidos will only communicate with you through emails that are generated by the Leidos.com automated system—never from free commercial services or messaging apps. If you receive an email purporting to be from Leidos that asks for personal information or payment, please report it immediately by emailing [e-mail].

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

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