Job Description

Data Scientist

Onsite - Fort Belvoir

165k-175k/year

Army Contract - until August 2029

Marathon TS is seeking a highly experienced Data Scientist to lead AI/ML development efforts in support of our client. This individual will serve as the primary data science expert on the team, responsible for independently designing, building, and validating machine learning models that drive legal and operational insight.

This role requires a hands-on practitioner with deep technical skill, strong analytical instincts, and the ability to influence both strategy and implementation. You'll be expected to move comfortably between data exploration, model development, and collaboration with engineers and developers to bring AI solutions into production.

Key Responsibilities

• Lead the design and development of machine learning models tailored to legal and operational mission needs
• Conduct in-depth exploratory data analysis to uncover patterns, guide model design, and inform decision-making
• Apply hypothesis-driven approaches to validate the performance, relevance, and fairness of AI/ML solutions
• Collaborate with data engineer to ensure data quality, structure, and accessibility meet model requirements
• Work closely with AI/ML engineers to operationalize models, including performance monitoring and optimization
• Contribute to model integration efforts with application developers to support real-world use and feedback loops

Required Qualifications

• 5–10 years of experience in data science and applied machine learning.
• Demonstrated ability to lead end-to-end model development independently, from exploration to deployment
• Advanced proficiency in Python and relevant ML libraries (e.g., scikit-learn, TensorFlow)
• Strong foundation in statistical analysis, model evaluation techniques, and experimental design
• Experience with both structured and unstructured data sources
• Clear and confident communicator with a proven ability to collaborate across technical teams
• Ability to obtain a DOD clearance

Preferred Qualifications

• Experience supporting DoD or federal clients, ideally in mission-driven environments
• Familiarity with natural language processing (NLP), particularly with legal or document-based data
• Understanding of MLOps workflows, including model versioning, deployment, and monitoring

Marathon TS is committed to the development of a creative, diverse and inclusive work environment. In order to provide equal employment and advancement opportunities to all individuals, employment decisions at Marathon TS will be based on merit, qualifications, and abilities. Marathon TS does not discriminate against any person because of race, color, creed, religion, sex, national origin, disability, age or any other characteristic protected by law (referred to as "protected status").

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