Katana VentraIP

Nexor

Nexor Limited is a privately held company based in Nottingham, providing products and services to safeguard government, defence and critical national infrastructure computer systems. It was originally known as X-Tel Services Limited.

Company type

1989 (1989) (as X-Tel Services Limited)
U.K.

Hugh Smith, Graeme Lunt, Julian Onions

Stephen Kingan (CEO)

Nexor Sentinel, Nexor Guardian, Nexor Merlin, Nexor Data Diode, Nexor Border Gateway, MMHS

CyberShield Secure

Stephen Kingan

Katana VentraIP

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Katana VentraIP

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History[edit]

Nexor Limited[1] was founded in 1989 as X-Tel Services Limited out of the University of Nottingham and UCL, following research into X.400 and X.500 systems for the ISODE project. In 1992 Stephen Kingan joined the business as CEO.[2] In 1993 X-Tel Services Limited was renamed Nexor Limited. In 1996 3i invested in the business to launch Nexor Inc. In 2004 Kingan and Nigel Fasey acquired the business. In 2008 Colin Robbins was appointed to the board as CTO. In 2012 Kingan acquired 100% ownership of Nexor. In October 2013, the company moved its headquarters from Nottingham Science Park to the NG2 Business Park.[3]


Nexor customers include NATO,[4][5] European Defence Agency,[6][7] UK MoD,[8][9] US DOD,[10] Canadian DND,[11] Foreign and Commonwealth Office[12] and Met Office.[13][14] Nexor designed and deployed the first public Internet search engine ALIWEB and the associated robots exclusion standard. Nexor is a contributor to the Internet Engineering Task Force, having worked on Internet RFCs 1086,[15] 1165,[16] 1488,[17] 1606[18] and 1778.[19] Nexor developed a Microsoft Exchange Client for Unix.[20] Nexor was the first organisation to be awarded the Intellect Best Practice Certificate.[21] Nexor has run regular demonstrations at the Coalition Warrior Interoperability Demonstration.[22][23] Nexor was the first organisation to achieve TickItPlus[24] a quality-management certification program for software development. Nexor has strategic partnerships with Boldon James[25] and QinetiQ.[26] Nexor's Data Diode product is supplied via an OEM relationship with Fox-IT. Nexor is a supplier of the UK Government G-Cloud Cloudstore,[27] and an Official cyber security supplier to the UK Government.[28] Nexor won 2013 DSEi innovation challenge.[29]


Nexor is a contributor to Cyber Champions a community initiative to promote best practices in digital literacy and online safety awareness to schools, youth organisations and interest groups across the UK.[30] Nexor sponsors the Cyber Security Challenge designed to promote careers in cyber security.[31] Nexor was in the first batch of companies to achieve the UK’s Cyber Essential standard[32] and a contributor and industry launch partner to the PAS754 software development standard led by the Trustworthy Software Initiative. In 2015 Nexor launched a consulting arm - Qonex[33][34][35][36]

Many Nexor employees (current and former) have made notable contributions to the Internet or business community, including:

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to enforce one way data flows

Data Diodes

and High Assurance Guards to authorise and filter email and data communications

Data Guards

and Information Exchange Gateways to enable secure information exchange between secure networks

Cross Domain Solutions

CyberShield Secure to ensure secure development and deployment of Nexor's technology

[37]

Military Message Handling System

Stephen Kingan (1992–present) – Chairman and CEO. Kingan was also a non-executive director of (2005-2011)[74] and is a founding member of the Security and Resilience Industry Council (RISC).[75]

Investors in People

(1992–1995) – Creator of ALIWEB, the first Internet search engine.[76]

Martijn Koster

Dr Graeme Lunt (1990–2004) — Co-founder of Nexor and creator of the first UNIX X.400 User Agent for Microsoft Exchange.

[77]

(2012–present) – Non-executive Director

Mark Harman

Julian Onions (1990–2013) – Co-founder of Nexor and messaging expert behind , author of RFCs 1086,[15] 1165[16] and 1606.[18]

PP

(1990–present) – Technical Director and co-author of LDAP.[78]

Colin Robbins

Dr Hugh Smith (1990–2000) – Co-founder of Nexor, while a Reader in Computer Science at the University of Nottingham. Smith became an owner of EIBS,[80] an evolution of the Regis project. Smith died in 2020.[81]

[79]

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Nexor Corporate Web Site

Qonex - Nexor's consulting division

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