TDI (Tetrad Digital Integrity)

TDI, short for Tetrad Digital Integrity, is a cybersecurity firm founded in 2001. It serves government agencies and commercial clients and says it has delivered hundreds of cybersecurity programmes. Its current website positions it around Cybersecurity Performance Management, a framework it says it pioneered.

What TDI offers

• Governance, risk and compliance — helping clients meet cybersecurity standards.
• Cyber engineering and operations — services run to protect, detect, respond and recover.
• Vulnerability assessment and penetration testing — testing of client systems.
• Authorisation and accreditation — certification-type assessment work.
• Resilience planning — disaster recovery, business continuity and incident response.
• Network security — across cybersecurity engineering.

Who it works with

Government agencies and commercial organisations around the world, including critical and highly targeted bodies.

Key facts

• Founded: 2001
• Based in: Washington DC, with locations in Maryland, Virginia and the United Kingdom
• Staff abroad: deployed in Singapore, Guam, Bahrain and Japan, among other places
• Charity: its chief executive chairs White Hat USA, which supports a children's hospital