Data Scientist jobs in McLean hiring now at vetted startups and product companies on Alion, updated daily. Average salary around $213,779/year. Compare remote, hybrid and on-site positions with relocation and visa sponsorship. Browse and apply today.
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boozallen.com • HQ: McLean, United States • Intelligence • Management Consulting • National Security • IT Consulting & Digital Transformation • 5000+ employees • Est. 1914 • IT services • Trust A • Hiring 1545, 149 new
HQ: McLean, United States • Intelligence • Management Consulting • National Security • IT Consulting & Digital Transformation • 5000+ employees • Est. 1914 • IT services • Trust A • Hiring 1545, 149 new
Booz Allen Hamilton is an American consulting firm founded in 1914 that has spent most of the past century working for the United States government, and today derives almost all of its revenue from federal clients. It supplies technology and mission services to defence, intelligence, civil and health agencies, covering systems engineering, cyber operations, data platforms and increasingly artificial intelligence deployed inside classified environments. Headquartered in McLean, Virginia and listed on the New York Stock Exchange, it employs tens of thousands of security-cleared staff and competes with the other large federal services contractors for multi-year programme awards.
$99k – $225k per year • Middle • 3+ years exp • In office (McLean, United States) • Bachelor's Degree • Full-Time • Nationals only • Citizenship or vetting required • Middle
freddiemac.com • HQ: McLean, United States • Mortgage Lending & Brokers • 501-1000 employees • Est. 1970 • Trust B • Hiring 62, 9 new
HQ: McLean, United States • Mortgage Lending & Brokers • 501-1000 employees • Est. 1970 • Trust B • Hiring 62, 9 new
Freddie Mac, the Federal Home Loan Mortgage Corporation, is a government-sponsored enterprise headquartered in McLean, Virginia, that buys mortgages from lenders and packages them into securities to provide liquidity to the US housing finance market. Chartered by Congress in 1970, it has funded trillions of dollars in single-family and multifamily loans and has operated under the conservatorship of the Federal Housing Finance Agency since 2008. It hires software engineers, product owners, risk and valuation professionals, treasury and capital markets operations staff, multifamily production associates and account executives.
capitalone.com • HQ: McLean, United States • Leasing, Auto & Equipment Finance • Commercial & Retail Banks • Cards & Card Issuing • 5000+ employees • Est. 1994 • Trust B • Hiring 1484, 122 new
HQ: McLean, United States • Leasing, Auto & Equipment Finance • Commercial & Retail Banks • Cards & Card Issuing • 5000+ employees • Est. 1994 • Trust B • Hiring 1484, 122 new
Capital One is an American bank founded in 1994 that began as a credit card monoline built on statistical testing of offers and pricing, an approach it called information-based strategy. It is now one of the largest card issuers in the United States alongside a national direct bank, an auto lending business and a commercial bank, and it completed the acquisition of Discover in 2025, which gave it a payments network of its own rather than dependence on Visa and Mastercard. Headquartered in McLean, Virginia, it was also an early mover among large banks in migrating its entire technology estate to the public cloud.
mitre.org • HQ: McLean, United States • Space & Aerospace • Homeland Security • National Security • 1001-5000 employees • Est. 1958 • Hiring 283, 136 new
HQ: McLean, United States • Space & Aerospace • Homeland Security • National Security • 1001-5000 employees • Est. 1958 • Hiring 283, 136 new
MITRE is an American not for profit corporation that operates federally funded research and development centres for United States government agencies. Its artificial intelligence work spans model assurance, adversarial machine learning and the widely used ATLAS knowledge base of attacks against machine learning systems. The organisation advises defence, aviation, health and cybersecurity agencies and deliberately holds no commercial products of its own; its centres also maintain the ATT&CK framework that security teams everywhere rely on.
$155k – $194k per year • Lead • 8+ years exp • In office (McLean, United States) • Bachelor's Degree • Full-Time • Top Secret • Citizenship or vetting required • Staff
$124k – $156k per year • Senior • 5+ years exp • In office (McLean, United States) • Bachelor's Degree • Full-Time • Top Secret • Citizenship or vetting required • Senior
octconsulting.com • HQ: McLean, United States • Professional Services • Information Technology • IT Consulting & Digital Transformation • Management Consulting • Est. 2013 • Hiring 13, 7 new
HQ: McLean, United States • Professional Services • Information Technology • IT Consulting & Digital Transformation • Management Consulting • Est. 2013 • Hiring 13, 7 new
OCT Consulting is a professional services and information technology firm that provides specialized consulting solutions primarily to federal government clients. Headquartered in McLean, Virginia, the company delivers expertise in program management, financial management, acquisition and procurement, and digital IT modernization. Established in 2013 as a certified small disadvantaged business, it aims to streamline public sector operations by minimizing bureaucracy and driving high-efficiency results.
peraton.com • HQ: Reston, United States • Systems Integrators • Information Security • Homeland Security • National Security • 1001-5000 employees • Est. 2017 • Trust A • Hiring 976, 176 new
HQ: Reston, United States • Systems Integrators • Information Security • Homeland Security • National Security • 1001-5000 employees • Est. 2017 • Trust A • Hiring 976, 176 new
Peraton is an American national security and technology company that provides systems engineering, IT modernisation, cyber, space and communications services to defense, intelligence, homeland security, civil and health agencies of the US government. Formed in 2017 by Veritas Capital and enlarged in 2021 through the acquisitions of the federal IT and mission support business of Northrop Grumman and of Perspecta, it employs tens of thousands of people across the United States. The company is headquartered in Reston, Virginia, United States.
ardentprinciples.com • HQ: Chantilly, United States • IT Staffing & Staff Augmentation • AI Consulting & Integration • Data Engineering & Migration Services • Custom Software Development • 51-200 employees • Trust A • Hiring 24, 5 new
HQ: Chantilly, United States • IT Staffing & Staff Augmentation • AI Consulting & Integration • Data Engineering & Migration Services • Custom Software Development • 51-200 employees • Trust A • Hiring 24, 5 new
Ardent Principles is an American information technology services firm in the Washington DC area that offers data science, data engineering, software engineering, AI solutions, cybersecurity, staff augmentation and IT program management to its clients. It was founded by chief executive Robert McCauley, a Howard University computer science graduate with more than two decades in IT, and most of its openings are in Northern Virginia, chiefly Chantilly, McLean, Herndon and Reston. It hires software developers in Java, Spring Boot and ServiceNow, data scientists, machine learning and AI engineers, cloud, network and Linux engineers, cyber security engineers and systems architects.
guidehouse.com • HQ: McLean, United States • Digital Government • IT Consulting & Digital Transformation • Management Consulting • 1001-5000 employees • Est. 2018 • IT services • Trust B • Hiring 555, 62 new
HQ: McLean, United States • Digital Government • IT Consulting & Digital Transformation • Management Consulting • 1001-5000 employees • Est. 2018 • IT services • Trust B • Hiring 555, 62 new
Guidehouse is a management and technology consultancy created in 2018 when Veritas Capital bought the public sector advisory practice of PwC, and expanded a year later by acquiring Navigant. It advises United States federal and state agencies, health systems, energy utilities and financial institutions on programme delivery, regulatory compliance, risk, digital modernisation and data analytics, with a heavy concentration in defence, health and civilian government work. Headquartered in McLean, Virginia, the firm employs a large share of security-cleared staff and was acquired by Bain Capital in 2023.
steampunk.com • HQ: McLean, United States • Custom Software Development • Digital Government • 1001-5000 employees • Est. 2019 • Hiring 145, 5 new
HQ: McLean, United States • Custom Software Development • Digital Government • 1001-5000 employees • Est. 2019 • Hiring 145, 5 new
Steampunk is a US government technology and design consultancy headquartered in McLean, Virginia, that delivers human-centered design, agile software development, cloud, DevSecOps, data and cybersecurity services to federal agencies. It applies its trademarked Design Intelligence approach to modernization programs for federal clients, combining a start-up culture with a design studio next to its Tysons Corner offices. It hires cloud and enterprise architects, DevSecOps and software engineers, Salesforce and ServiceNow specialists, data engineers, cybersecurity experts, service designers and program and project managers.
infinitive.com • HQ: McLean, United States • IT Consulting & Digital Transformation • Predictive Analytics • Data & Analytics • 51-200 employees • Hiring 15, 1 new
HQ: McLean, United States • IT Consulting & Digital Transformation • Predictive Analytics • Data & Analytics • 51-200 employees • Hiring 15, 1 new
Get the value out of your data with Infinitive, the leaders in data analytics and cloud development.
j5consulting.co • HQ: Bowie, United States • Information Technology • IT Infrastructure & Networking Services • IT Consulting & Digital Transformation • 201-500 employees • Est. 2006 • Hiring 64
HQ: Bowie, United States • Information Technology • IT Infrastructure & Networking Services • IT Consulting & Digital Transformation • 201-500 employees • Est. 2006 • Hiring 64
Founded in 2006, J5 Consulting is an information technology and cybersecurity consulting firm headquartered in Bowie, Maryland. Drawing on extensive experience supporting federal government, defense, and commercial enterprises, the company delivers mission-critical IT modernization, enterprise architecture, and cyber defense solutions. Its core service offerings span governance, risk management, and compliance (GRC) audits aligned with NIST and CMMC frameworks, multi-cloud security engineering across AWS and Azure, vulnerability assessments, and continuous monitoring designed to safeguard sensitive assets and maintain regulatory compliance.
vantor.com • HQ: Westminster, United States • Space Services • Geospatial Analytics • Earth Observation • 201-500 employees • Est. 2025 • Trust B • Hiring 131, 17 new
HQ: Westminster, United States • Space Services • Geospatial Analytics • Earth Observation • 201-500 employees • Est. 2025 • Trust B • Hiring 131, 17 new
Vantor is an American space intelligence company created in 2025 when Maxar Technologies split its Earth imaging business from its satellite manufacturing arm and renamed it. It operates one of the largest commercial high-resolution imaging constellations, sells satellite imagery, three-dimensional terrain data and analytics to defence, intelligence and government customers, and holds long-running United States government imagery contracts. Headquartered in Westminster, Colorado and owned by Advent International, it competes with the newer smallsat operators while retaining the archive and geospatial accuracy built up over decades.
leidos.com • HQ: Reston, United States • C4ISR • National Security • Engineering Services • Defense Manufacturing • Systems Integrators • 5000+ employees • Est. 2013 • IT services • Trust B • Hiring 1557, 144 new
HQ: Reston, United States • C4ISR • National Security • Engineering Services • Defense Manufacturing • Systems Integrators • 5000+ employees • Est. 2013 • IT services • Trust B • Hiring 1557, 144 new
Leidos is an American technology and engineering services company created in 2013 when Science Applications International Corporation split in two, with Leidos taking the technical services and solutions business. It is one of the largest suppliers to the United States government, working across defence programmes, intelligence systems, civil agencies including the Federal Aviation Administration, and healthcare services for the Department of Veterans Affairs. Headquartered in Reston, Virginia, the company also builds security detection products for airports and borders, and has concentrated recent investment on trusted artificial intelligence and autonomy for mission environments.
credence.ai • HQ: Tysons, United States • Information Security • National Security • IT Consulting & Digital Transformation • AI Consulting & Integration • 1001-5000 employees • Trust B • Hiring 88, 12 new
HQ: Tysons, United States • Information Security • National Security • IT Consulting & Digital Transformation • AI Consulting & Integration • 1001-5000 employees • Trust B • Hiring 88, 12 new
Credence is a US government services contractor headquartered in Tysons, Virginia, that provides AI, cloud, data, cybersecurity and modernization services alongside logistics, intelligence, engineering and mission support for defense, health and foreign assistance agencies. The firm reports more than 1,700 team members and over 100 prime contracts, holds vehicles such as GSA OASIS+ and GSA Alliant 3, and supports F-16 and B-2 programs of the Air Force Life Cycle Management Center. It hires systems and avionics engineers, cybersecurity specialists, data and AI engineers, program managers, intelligence planners and administrative staff, many requiring security clearances.
Headquartered in London, United Kingdom, EY (Ernst & Young) is a multinational professional services network and one of the "Big Four" accounting firms. The organization provides financial assurance and auditing, tax advisory, management and technology consulting, and strategy and transactions advisory through its EY-Parthenon arm. Operating across more than 150 countries, it delivers risk management, digital transformation, data analytics, and regulatory compliance solutions to multinational corporations, financial institutions, and government entities worldwide.
defcon.social • Coronado • McLean • Torrance • New York • Online Forums & Community Platforms • Hiring 7, 1 new
Coronado • McLean • Torrance • New York • Online Forums & Community Platforms • Hiring 7, 1 new
DEFCON.social = The intersection of technology and society, a community for artists, hackers, policy, academics, researchers, infosec, activists & cyberpunks.
closure-tech.com • HQ: Chantilly, United States • AI Consulting & Integration • IT Consulting & Digital Transformation • 201-500 employees • Est. 2025 • Trust B • Hiring 6
HQ: Chantilly, United States • AI Consulting & Integration • IT Consulting & Digital Transformation • 201-500 employees • Est. 2025 • Trust B • Hiring 6
Enterprise-grade AI, cloud, and software development services. We transform complex challenges into competitive advantages.
theleadingpath.com • HQ: McLean, United States • IT Staffing & Staff Augmentation • Systems Integrators • Trust B • Hiring 16, 2 new
HQ: McLean, United States • IT Staffing & Staff Augmentation • Systems Integrators • Trust B • Hiring 16, 2 new
The Leading Path is a technology services company supporting cleared national security programs with data engineering, systems engineering, cloud and network engineering and software development. Its vacancies require top secret clearances with polygraph and include data engineers, data scientists, cleared network engineers and intelligence recruiters. The company is headquartered in McLean, Virginia, United States.
clarkconstruction.com • HQ: Bethesda, United States • Civil & Structural Engineering • Construction • 1001-5000 employees • Est. 1906 • Trust A • Hiring 301
HQ: Bethesda, United States • Civil & Structural Engineering • Construction • 1001-5000 employees • Est. 1906 • Trust A • Hiring 301
Founded in 1906, Clark Construction Group is one of the largest building and civil infrastructure enterprises in the United States. Headquartered in Bethesda, Maryland, United States, the company serves commercial, government, transportation, energy, and institutional sectors nationwide. Through its integrated asset delivery capabilities - encompassing general contracting, preconstruction planning, heavy civil engineering, self-perform trades, and mission-critical project management - it constructs complex commercial real estate, transit systems, water infrastructure, and technology facilities.
gci.tech • HQ: Reston, United States • Cyber Warfare • Intelligence • National Security • 1001-5000 employees • Est. 1989 • Trust B • Hiring 42, 3 new
HQ: Reston, United States • Cyber Warfare • Intelligence • National Security • 1001-5000 employees • Est. 1989 • Trust B • Hiring 42, 3 new
GCI is an American engineering and IT services company supporting national security and intelligence customers. Established in 1989, it provides data analytics, software development, cyber operations, targeting and analysis, operations and training, hiring cleared AI/ML engineers, software engineers and cyber analysts. The company is headquartered in Reston, Virginia, United States.
