ManTech International

ManTech International

Defense contracting firm providing cybersecurity and systems engineering services to federal government agencies.

VirginiaSystems Integration Services

About ManTech International

ManTech is a dedicated technology company specializing in cyber security, IT services, and data analytics solutions aimed at enhancing security programs for the U.S. government. With a commitment to public trust, ManTech prioritizes the welfare of service members, veterans, and community safety while contributing to improved healthcare. With over 50 years of experience, ManTech has evolved to meet the ever-changing technology needs of federal managers and military leaders. The company employs over 9,800 skilled professionals, nearly half of whom are veterans, drawing expertise from the Intelligence Community, Homeland Security, and federal agencies. This deep understanding of customer challenges allows ManTech to effectively address their most complex issues in fields such as cyber security, data analysis, and systems engineering. With a strong ethic of service and dedication, ManTech is a trusted partner in achieving mission success.

Editorial Review

Our take on ManTech International

ManTech International is a defense contracting firm headquartered in Herndon, Virginia, with roots dating to 1968. The company was acquired by The Carlyle Group in 2022, taking it private after years as a publicly traded company.

ManTech employs over 7,000 professionals supporting more than 50 U.S. government agencies across over 1,000 contracts. Their expertise spans cybersecurity, C4ISR life-cycle support, intelligence/counter-intelligence support, IT modernization, systems engineering, and global logistics support.

The company's technical capabilities include AI-powered cyber solutions, hybrid multi-cloud mission-centric IT solutions, software development, and application modernization services through their state-of-the-art software factory. ManTech has made strategic acquisitions including Gryphon Technologies (2021) for systems engineering and 7Delta for healthcare IT applications.

ManTech's strong relationships with the Intelligence Community, Department of Defense, and federal civilian agencies provide stable, long-term revenue streams. Nearly half of their employees are veterans, bringing authentic understanding of mission requirements. For organizations requiring deep expertise in classified environments and mission-critical systems, ManTech offers specialized capabilities, though their recent privatization means less public financial transparency.

Badges & Credentials

Verified credentials and recognition earned by ManTech International

5 badges

Verification

Verified

This agency has a verified website presence.

LinkedIn Verified

This agency has a verified LinkedIn company page.

Recognition

Top Rated

This agency has an exceptional AgencyCluster score of 80+.

Experience

15+ Years

Established in 1968. Over 15 years of experience.

Company

Large Team

Large (201-500)

Awards & Recognition

Rankings earned on AgencyCluster

Top 50 Systems Integration Services - 2026

Top 50 Systems Integration Services

Nationwide · 2026

Top 10 Systems Integration Services in Virginia - 2026

Top 10 Systems Integration Services

Virginia · 2026

Top 25 Systems Integration Services - 2026

Top 25 Systems Integration Services

Nationwide · 2026

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About ManTech International

Common questions about ManTech International.

Where does ManTech International rank on AgencyCluster?

ManTech International has earned rankings on 3 AgencyCluster lists: Top 50 Systems Integration Services, Top 10 Systems Integration Services in Virginia, Top 25 Systems Integration Services. Their highest AgencyCluster Score is 93/100. Rankings are merit-based and determined by evidence across six evaluation pillars — agencies cannot pay for higher positions.

What are ManTech International's strengths according to AgencyCluster?

In our evaluation for Systems Integration Services, ManTech International scores 93/100 overall. Their strongest areas are Credibility, Reputation, Category Fit, Delivery Maturity, Proof of Work & Outcomes, Freshness. A high Outcomes score means they have verifiable case studies with measurable results — the most heavily weighted factor in our methodology.

How long has ManTech International been in business?

ManTech International was founded in 1968, giving them over three decades of experience in systems integration services. In an industry where many agencies are less than 5 years old, 58+ years of sustained operations signals stability, client retention, and the ability to adapt through multiple technology cycles. Today, the team is large team.

Is ManTech International a verified agency?

Yes. ManTech International has been vetted and verified by AgencyCluster's editorial team through a rigorous, multi-factor review process. Unlike self-serve directories, AgencyCluster does not accept automated submissions — every agency is evaluated manually before being published. Our vetting covers identity verification (website, LinkedIn, domain age), business legitimacy (years of operation, team size, registered presence), evidence of work (case studies, portfolio, client outcomes), reputation checks across third-party platforms, activeness and freshness of their online presence, and screening for red flags including misconduct, fraud, or misleading claims. Agencies that fail any critical check are not listed. For ManTech International, verified signals include a functioning website, LinkedIn company profile, 58+ years of operating history (founded 1968), 3 earned rankings on curated top lists.