Data Scientist - levels - TS​/SCI Security Clearance

Position: Data Scientist - Multiple levels - Required TS/SCI with Security Clearance
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- Description The Mission Solutions Business Area at Leidos has an opening for a Data Scientist in Reston, Virginia to support a fast-paced software development team working on projects critical to National Security. The primary focus of the group is reverse engineering Weapons of Mass Destruction (WMD) related installations. Candidate must bring a creative, yet sound, approach to identifying and solving challenges, and have exceptional attention to detail and a commitment to thoroughness The successful candidate will have experience in statistical analysis, data ingestion/processing, and experience with methods/analytics development, to support our customer’s data analytics program.

You will work as part of a team to support the verification and validation of computer assisted product development and to present the results to the customer. Role and Responsibility:
The candidate shall perform the following as part of a larger team:
* Build statistical models, test hypotheses, interpret, summarize, visualize, and succinctly report on data findings

* Perform research on various data sources, to include unstructured data using quantitative and qualitative content analytics

* Construct and perform complex database search queries in multiple databases using SQL and API interfaces

* Perform web scraping and apply various techniques for processing unstructured data. The Scientist will leverage automation and machine learning to manage data, predict scenarios and make recommendations.

* Contribute to building new analytical tools and packages across the enterprise and will be expected to collaborate with team members in a highly technical environment

* Learn and leverage emerging technologies including AWS and Git

* Excellent written and verbal communication skills with the ability to successfully brief and interact with personnel at all levels of experience, including Senior Officials Requirements and

Qualifications:

* US Citizenship is required

* Candidate must possess an active TS/SCI, or a Top Secret clearance with a current SSBI, and be eligible to obtain a TS/SCI w/ poly level clearance

* BS degree and >6 years of prior relevant experience or MS with >4 years of prior relevant experience. May possess a Doctorate in a technical domain

* Must have a Data Science, Operations Research or related degree

* Strong experience with Python

* Experience working with data manipulation, analytic/business insight tools, and data visualization experience

* Experience constructing and performing complex database search queries

* Experience/knowledge of computer science concepts, data architecture, and experience/knowledge of statistics

* Demonstrated experience using statistical and machine learning techniques including supervised and unsupervised learning and natural language processing

* Experience/familiarity with frequentist statistics and probability including predicative modeling

* Ability to communicate technical findings to non-technical audiences

Preferred Qualifications:

* Experience with spatial (3D) or building infrastructure (e.g. electrical, HVAC systems) data

* Experience with AI model development

* Experience with Defense Intelligence Agency computer systems and data management processes
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:
September 24, 2025 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 $ - $ 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…