Six3 Systems
Six3 Systems is a U.S. government contractor that provides strategic solutions to Intelligence, Defense, and Civilian federal agencies. Founded in 2009 and based in McLean, Virginia, the firm serves a 1,001–5,000 employee workforce across the national security mission space.
- Company typePrivate
- Founded2009
- HeadquartersMclean, United States
- Headcount1,001–5,000
- GTM typeB2B
- OfferingServices
What Six3 Systems does
Six3 Systems, Inc. is a U.S. government services provider that delivers strategic solutions to agencies across the Intelligence Community, the Department of Defense, and the federal civilian sector. Founded in 2009 and headquartered in McLean, Virginia, the firm operates as a private, for-profit company with a workforce of 1,001–5,000 employees, placing it in the mid-tier segment of the government IT and services market. Its customer base is exclusively U.S. federal government entities, which is consistent with the typical operating model for cleared, facility-cleared contractors serving the national security mission space.
The available source material does not disclose specific products, technology stacks, service offerings, contract vehicles, or platform architecture. The company's public website (six3systems.com) currently exposes only a 'Do Not Sell or Share My Personal Information' link, indicating either a minimal web presence, a client-only portal orientation, or a post-acquisition state where the brand is maintained separately. No pricing model, product catalog, certification list (e.g., CMMI, ISO, FedRAMP), or named customer programs are present in the input data.
Because the company is private and detailed financial, operational, and product information is absent from the source set, the available evidence is limited to firmographics (year founded, headcount band, location, customer focus, ownership status) and one source ID that explicitly flags a lack of revenue and ownership data. Any deeper claims about the business model, revenue mechanics, or competitive positioning are not supported by the input and are not asserted here.
Six3 Systems firmographics
Firmographics- Name
- Six3 Systems
- Website
- https://six3systems.com
- Company type
- Private
- Founded year
- 2009
- Headcount range
- 1,001–5,000 employees
- Short description
- Six3 Systems is a U.S. government contractor that provides strategic solutions to Intelligence, Defense, and Civilian federal agencies. Founded in 2009 and based in McLean, Virginia, the firm serves a 1,001–5,000 employee workforce across the national security mission space.
- Ownership category
- akta.pro rank
Where Six3 Systems is headquartered
LocationHeadquarters
- HQ city
- Mclean
- HQ country
- United States
- HQ region
- North America
Markets served
Six3 Systems business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel
Six3 Systems product offering
Product offeringCore offering
Six3 Systems, Inc. provides strategic solutions to U.S. Government agencies in the Intelligence, Defense, and Civilian communities. The firm operates as a government contractor delivering services to federal intelligence, defense, and civilian agencies. Specific product lines, solution offerings, or service categories are not detailed in the source material.
Differentiator
Problem solved
Functional benefit
Companies that use Six3 Systems
Customer profileIdeal customer profiles1 record
Six3 Systems technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Six3 Systems partnerships and signals
Strategic signalRecent moves1 record
Six3 Systems competitors and assessment
Company assessmentBroad incumbents
- SAIC: Major federal IT and technical services provider across intelligence, defense, and civilian agencies with broad C4ISR and systems integration capabilities — directly comparable customer footprint and scale.
- CACI International: Large prime contractor focused on defense, intelligence, and federal civilian IT services, including C4ISR and mission systems — the closest large-scale analog to Six3's stated mission set and customer base.
- Leidos: Top-tier defense and intelligence contractor delivering IT, C4ISR, and mission solutions to IC, DoD, and federal civilian customers — comparable mission set at much larger scale.
- Parsons Corporation: Diversified federal solutions provider with significant intelligence, defense, and critical infrastructure work — overlapping customer set in the federal services market.
- Booz Allen Hamilton: Consulting and engineering firm with a large federal practice serving defense, intelligence, and civilian agencies; comparable IC/DoD IT and analytic-services mix.
Direct peers
- Engility (now SAIC): Mid-tier federal services firm focused on defense and intelligence customers prior to its SAIC merger — highly comparable business model and customer base to Six3.
- ManTech International: Mid-to-large federal services firm specializing in C4ISR, intelligence, and IT for IC and DoD customers; highly comparable scope, size, and customer alignment to Six3.
- Noblis: Mid-sized nonprofit federal services organization providing scientific, engineering, and IT support to civilian and defense agencies — comparable mission and scale tier.
- ICF International: Mid-sized consulting and digital services provider with substantial federal defense, intelligence, and civilian practices — comparable customer set and technical-services mix.
- Perspecta (now Peraton): Government services firm delivering IT, C4ISR, and mission support across IC, DoD, and federal civilian — closely comparable customer and capability profile.
Market position
Strengths3 records
Weaknesses3 records
Competitive moat3 records
Key risks4 records
Key highlights4 records
Customer concentration
Six3 Systems social profiles
Digital presenceSix3 Systems financial estimates
Financial estimateRevenue estimate
Valuation estimate
Six3 Systems leadership team
Management profileNumber of profiles
Six3 Systems funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Six3 Systems M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Six3 Systems
What does Six3 Systems do?
Six3 Systems, Inc. provides strategic solutions to U.S. Government agencies in the Intelligence, Defense, and Civilian communities. The firm operates as a government contractor delivering services to federal intelligence, defense, and civilian agencies. Specific product lines, solution offerings, or service categories are not detailed in the source material.
When was Six3 Systems founded?
Six3 Systems was founded in 2009. It employs 1,001 to 5,000 people.
Where is Six3 Systems based?
Six3 Systems is headquartered in Mclean, United States, in the North America region.
Who are Six3 Systems's main competitors?
Broad incumbents on record are SAIC, CACI International, Leidos, Parsons Corporation and Booz Allen Hamilton. Direct peers are Engility (now SAIC), ManTech International, Noblis, ICF International and Perspecta (now Peraton).
Does Six3 Systems have an API?
No public API is recorded for Six3 Systems.