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Company profile

Millennium Tech Stack

Red team and cyber assessment services for DoD and federal civilian agencies

Information Technology & Services Arlington, VA 201–500 employees Founded 2004 Privately Held
millgroupinc.com LinkedIn

Millennium is an Arlington-based cybersecurity contractor whose stack reads like an offensive security toolkit: Kali Linux, Cobalt Strike, Metasploit and Burp Suite sit alongside AWS, Terraform and Kubernetes for building test ranges. Hiring is accelerating and overwhelmingly senior security talent, tied to DOT&E cyber assessment work, OPFOR adversarial testing and an emerging focus on AI system vulnerabilities.

Tech Stack 74 technologies

Core StackPython Ruby Node.js GitLab RAG AWS Terraform CloudFormation Docker Kubernetes CloudWatch Splunk Datadog Elasticsearch Cisco VMware Hyper-V Ansible Jira Confluence Kali Linux Cobalt Strike Metasploit NeuVector Route 53 AWS Transit Gateway Proxmox pfSense OPNsense Burp Suite+44 more

What Millennium Is BuildingChallenges and projects from their job posts

◆Challenges

  • Identifying and managing vulnerabilities in DoD systems
  • Closing cyber readiness and capability gaps
  • Assessing security weaknesses in AI systems
  • Meeting DoD cybersecurity compliance requirements
  • Integrating security into CI/CD pipelines

▲Active Projects

  • DOT&E cyber assessment and readiness program
  • OPFOR adversarial and operational cybersecurity assessments
  • Penetration tests of global customer networks
  • Exploitation research and domain-specific tool development
  • Red team certification and accreditation
  • Improving cyber assessment methodologies

Hiring Activity

Accelerating35 roles · 25 in 30d

Department

Security
26
Engineering
5
Logistics
1
Ops
1
Sales
1

Seniority

Senior
22
Mid
9
Director
1
Junior
1
Lead
1

Notable leadership hires: Cybersecurity Assessment Lead

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About Millennium

Millennium is a privately held cybersecurity firm founded in 2004 and headquartered in Arlington, Virginia, with 201–500 employees. It supports Department of Defense and federal civilian customers across red team operations, defensive cyber operations, software engineering and technical engineering. Its services also span IT consulting, program and project management, and engineering solutions. Hiring is concentrated in the United States.

HeadquartersArlington, VA
Company Size201–500 employees
Founded2004
Hiring MarketsUnited States

Frequently Asked Questions

What tools does Millennium Corporation use for red teaming?

Millennium's stack includes Kali Linux, Cobalt Strike, Metasploit and Burp Suite, supported by Python, Ruby and Node.js, with Splunk, Datadog and Elasticsearch for monitoring.

Is Millennium Corporation hiring cybersecurity roles?

Yes. Hiring is accelerating and centered on security, mostly at senior level, with a Cybersecurity Assessment Lead among notable openings. All hiring is in the United States.

Where is Millennium Corporation headquartered?

Millennium is headquartered in Arlington, Virginia. It was founded in 2004 and has 201–500 employees serving DoD and federal civilian customers.

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How this profile is built

Millennium's technology stack, projects, and hiring signals are inferred from public hiring and company data — career pages, public listings, and company web presence — then clustered and de-duplicated. Figures are estimates that refresh over time. Read our full methodology →

This is not an official vendor or customer list. It is a technology-adoption signal inferred from public data, intended for B2B research.