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IronNet is a cybersecurity company that pioneered the Collective Defense platform, enabling organizations to detect and defend against advanced cyber threats in real-time. By sharing anonymized threat intelligence across sectors, IronNet enhances visibility and response capabilities, leveraging AI-driven behavioral analytics for Network Detection and Response (NDR). Founded by General (Ret.) Keith Alexander, former Director of the NSA, the company focuses on protecting critical infrastructures and enterprises. In December 2023, IronNet was acquired by C5 Capital, a specialist venture capital firm, aiming to bolster its market position and continue its mission.
Serves as a key operational center, historically housing executive leadership, corporate strategy, R&D in cybersecurity technologies, engineering, and coordination of sales and marketing efforts.
The office is located within a modern Class A office building in Tysons One Place, offering contemporary amenities and infrastructure. Specific unique architectural features of IronNet's leased space are not publicly highlighted; the focus is on a functional, secure, and collaborative workspace.
The Tysons HQ fostered a mission-driven culture, emphasizing innovation in cybersecurity and collective defense. It brought together professionals with backgrounds in national security, military intelligence, and enterprise technology, creating a fast-paced and results-oriented environment dedicated to solving complex cyber challenges.
Its Tysons location is highly significant due to its proximity to Washington D.C., U.S. federal government agencies (including defense and intelligence communities), and a rich ecosystem of cybersecurity talent and partner companies. This facilitated engagement with key public and private sector clients.
IronNet, now part of C5 Capital, maintains a global presence focused on delivering its Collective Defense and Network Detection and Response solutions worldwide. Operations are primarily supported from its North American and European hubs, with strategic interests in the Asia-Pacific region. Globally supported functions include sales and business development, customer success and support, threat intelligence operations via its IronDome platform, and ongoing security research. The acquisition by C5 Capital is intended to enhance IronNet's international reach and service capabilities for critical infrastructure and enterprises globally.
7900 Tysons One Place, Suite 450
McLean
Virginia
USA
Address: Central London, potentially co-located or aligned with C5 Capital's UK operations (48 Pall Mall, St. James's, London SW1Y 5JG, UK is C5's address).
To expand IronNet's Collective Defense footprint across EMEA, address region-specific cyber threats and regulatory environments, and support multinational clients, leveraging C5 Capital's strong European presence.
Address: Previously located in Singapore's central business district; current specific address and operational scale post-acquisition by C5 Capital are unconfirmed, though APAC remains a strategic region.
To establish and grow IronNet's presence in the Asia-Pacific region, catering to the unique cybersecurity challenges and opportunities in diverse markets. Future operations will be guided by C5 Capital's strategic direction for the region.
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As of April 2025, IronNet' leadership includes:
IronNet has been backed by several prominent investors over the years, including:
The past 12 months have been transformative for IronNet's executive team, primarily due to its Chapter 11 bankruptcy filing in October 2023 and subsequent acquisition by C5 Capital in December 2023. This led to significant leadership changes, notably the appointment of Linda Zecher as CEO in January 2024, and departures of previous top executives.
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IronNet likely utilizes standard corporate email formats for its employees. The most common patterns are typically [first_initial][last]@[companyname].com or [first].[last]@[companyname].com. For a company focused on cybersecurity, they may employ strict email policies and potentially use varied formats for different departments or security reasons.
[first_initial][last]@ironnet.com (e.g., jdoe@ironnet.com) or [first].[last]@ironnet.com (e.g., jane.doe@ironnet.com)
Format
jdoe@ironnet.com
Example
80%
Success rate
IronNet Website / PR Newswire • January 8, 2024
C5 Capital announced the completion of its acquisition of IronNet and the appointment of Linda Zecher as its new CEO. Zecher is tasked with leading IronNet's next phase of growth and innovation in the Collective Defense and Network Detection and Response markets....more
PR Newswire • December 12, 2023
C5 Capital, a specialist venture capital firm focused on cybersecurity, space, and energy transition, successfully completed its acquisition of IronNet. This move aims to stabilize IronNet and leverage its technology under new leadership....more
Bloomberg Law • October 27, 2023
IronNet Inc., founded by former NSA Director Gen. Keith Alexander, filed for Chapter 11 bankruptcy protection in the District of Delaware. The filing was intended to facilitate a sale of the company amid ongoing financial difficulties and delisting from the NYSE....more
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