Top 85 Senior data scientist Jobs in Loudoun County Va

Senior Data Scientist
Leidos —Chantilly, VA
- $154,050 - $278,475 a year
- Full-time
- Computer Science
- 11+ years
- Bachelor's degree
Senior Data Scientist
SOSi —Chantilly, VA
- $102,414 - $212,706 a year
- Full-time
- Computer Science
- Mid-level
- Office
Quick Apply
Senior Data Scientist - AI Trainer
DataAnnotation —Virginia
- $50 - $100 an hour
- Part-time
- Remote
- Computer Science
- English
- 3 years
- Flexible schedule
Quick Apply
14d
Sr Data Scientist, NPV Modeling
PenFed Credit Union —McLean, VA
- $84,700 - $172,907 a year
- Overtime
- Office
- Master's degree
- SQL
- Paid parental leave
- Disability insurance
Senior Data Analyst
Reithorp Solutions LLC —McLean, VA
- $145,000 - $180,000 a year
- Full-time
- 6 years
- Bachelor of Science
- Master's degree
- Paid holidays
- Health insurance
Quick Apply
3d
Senior Data Scientist - Government Clearance Required
General Dynamics Information Technology —Sterling, VA
- $152,150 - $205,850 a year
- Hybrid work
- Bachelor of Science
- Windows
- SQL
- Paid holidays
- 401(k) matching
Senior Data Scientist
Team Velocity —Herndon, VA
- $160,000 - $190,000 a year
- Online Application
- Remote
- 5 years
- Senior level
- Communication skills
- Health insurance
- Dental insurance
Quick Apply
Workforce & Sentiment Senior Data Scientist
Diligent Solutions —Ashburn, VA
- Full-time
- SQL
- Senior level
Senior Data Scientist
Maximus —Tysons, VA
- $153,000 - $182,000 a year
- 7 years
- Computer Science
- Military
- Paid holidays
- Disability insurance
9d
Senior Data science Engineer - Remote
RapidSoft Corp —Reston, VA
- Contract
- Remote
- Computer science
- Computer Science
- 5 years
Quick Apply
Sr. Data Scientist
Cognowiz —Herndon, VA
- Computer Science
- Office
- SQL
Senior Data Scientist
Tecolote Research, Inc. —Chantilly, VA
- $130,000 - $160,000 a year
- Full-time
- Office
- Senior level
- Business
- Paid jury duty
- AD&D insurance
Senior Data Analyst Principal
General Dynamics Information Technology —Gaithersburg, MD
- $142,792 - $167,900 a year
- Hybrid work
- Office
- SQL
- Analysis skills
- Paid holidays
- 401(k) matching
Principal Data Scientist
BULLFROG AI MANAGEMENT LLC —Gaithersburg, MD
- $175,000 - $215,000 a year
- Full-time
- Remote
- Computer Science
- 5 years
- Databases
- Paid holidays
- Disability insurance
Quick Apply
Senior Data Scientist
Guidehouse Inc. —Chantilly, VA
- Full-time
- Computer Science
- 3 years
- SQL
- Health savings account
- Paid holidays
Senior Software Engineer / Data Scientist (Training Systems)
Leidos —Chantilly, VA
- $154,050 - $278,475 a year
- Full-time
- Computer Science
- System design
- 8 years
Financial Model Development Senior (Python Developer)
Freddie Mac —McLean, VA
- $130,000 - $196,000 a year
- Full-time
- Computer Science
- 5 years
- Office
Senior Quantitative Analyst - AI Trainer
DataAnnotation —Virginia
- $50 - $100 an hour
- Part-time
- Remote
- Computer Science
- English
- Mid-level
- Flexible schedule
Quick Apply
14d
Senior Associate - AI Trainer
DataAnnotation —Chantilly, VA
- $50 - $100 an hour
- Part-time
- Remote
- English
- Mid-level
- Master's degree
Quick Apply
Remote Senior Accountant - AI Trainer
DataAnnotation —Fairfax, VA
- $50 - $100 an hour
- Part-time
- Remote
- Master's degree
- Bachelor's degree
- Doctor of Philosophy
Quick Apply

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senior data scientist jobs near loudoun county va

Senior Data Scientist

Leidos -
Chantilly, VA

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Job Details

Full-time
$154,050 - $278,475 a year

Qualifications

Data Integration (Data management)
Big data systems
Machine intelligence
Data-driven problem-solving
TS/SCI with Polygraph
Machine learning (ML) fundamentals
Project stakeholder communication

Full Job Description

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

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:

January 14, 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 $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 (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

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 (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at [email protected].

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.

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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