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By Light Professional IT Services Tech Stack

Defense IT modernization and cyber range training for U.S. government agencies

IT Services and IT Consulting McLean, VIRGINIA 1,001–5,000 employees Founded 2002 Privately Held

By Light is a defense contractor operating across network engineering, cybersecurity, and training infrastructure for DoD and intelligence agencies. Their tech stack—Cisco, Palo Alto, Splunk, Kubernetes, AWS/Azure—reflects legacy network migration work paired with cloud and container adoption. Active hiring of 99+ engineers and security specialists in the last 30 days, concentrated at senior/mid levels, signals acceleration on army modernization and cyber range content development projects, while pain points around compliance automation and anomalous activity detection suggest expansion into higher-assurance detection and response capabilities.

Tech Stack 156 technologies

Core StackPalo Alto Networks Kubernetes Jira Confluence AWS Azure AD Docker Splunk Cisco ASA Cisco Firepower Panorama SharePoint VMware NSX Red Hat VPN NAT BGP OSPF VLAN TOGAF DoDAF Azure Juniper MX Series Cisco ASR SSH IPsec IPv6 Carrier Ethernet YARA Snort+125 more

AdoptingL2VPN VPLS MPLS Wi-Fi VoIP

What By Light Professional IT Services Is Building

◆Challenges

Cybersecurity compliance
Anomalous activity detection
High tempo operations center
Quality and security of content
Identifying knowledge transfer gaps
Mission-critical network modernization
Automating integration and deployment of complex cybersecurity software
Ensuring compliance with government cyber security requirements
Modernizing combatant command infrastructure
Inventory management of lmr components

▲Active Projects

Us army comprehensive modernization (compmod)
Cyber range training events
Persistent cyber training enterprise (pcte-og)
Usfk km collaborative environment support
Instructor operator stations
Cyber range content development
Efis&t solutions
Specialized training for knowledge owners
Army network modernization
Information flow maps

Hiring Activity

Accelerating180 roles · 100 in 30d

Department

Engineering

94

Ops

23

Security

22

Support

9

Design

5

Logistics

5

HR

4

Training

4

Seniority

Senior

77

Mid

60

Junior

12

Manager

10

Lead

8

Principal

7

Intern

1

Staff

1

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About By Light Professional IT Services

By Light Professional IT Services delivers hardware and software engineering to U.S. defense, federal civilian, and intelligence customers. The company operates from McLean, Virginia, and employs 1,001–5,000 people. Core work includes network modernization (802.11, IP migration, DISN optimization), cybersecurity infrastructure (secure video systems, cyber ranges), and staff augmentation for deployed DoD forces. Recent projects span Army network upgrades, cyber range training events for knowledge transfer, and persistent training environments. The company also supports international carriers in network modernization.

HeadquartersMcLean, VIRGINIA

Company Size1,001–5,000 employees

Founded2002

Hiring MarketsUnited States, United Kingdom, South Korea, Colombia

Frequently Asked Questions

What tech stack does By Light Professional IT Services use?

Cisco ASA, Palo Alto Networks, Panorama, VMware NSX, Kubernetes, AWS, Azure, Splunk, Red Hat, and Juniper MX Series. Actively adopting MPLS, L2VPN, and VPLS for network upgrades.