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Mark O'Conor

Global Co-Chair, Technology Sector
He is an absolute pleasure to deal with; he's professional, courteous and pragmatic in his approach.
Client, Chambers UK 2020

Mark O'Conor has over 20 years’ experience of helping public and private sector clients with all aspects of IT law, particularly cloud and digital transformation, public procurement and outsourcing.

He advises companies and governments on digital transformation, agile development, open source, AI and cloud computing legal challenges. He has been involved in drafting and negotiating cloud computing contracts on both the provider and customer side.

Mark advised the UK Cabinet Office and the Open Geospatial Consortium (OGC) on the establishment of the G-Cloud, part of the UK public sector’s ICT strategy to meet the objectives of the Digital Britain report.

He has sought to help the UK public sector, and subsequently cloud vendors and large corporate customers, to find consensus and complete larger deals. He established an independent cloud forum, bringing together like-minded experts from vendor organisations such as Colt, Dell, Salesforce, Agilisys, Skyscape Cloud, Memset and Microsoft. Clients involved have included the Cabinet Office and various regulators.

Mark is often quoted in industry journals and has appeared on Sky News, CNBC and Radio 4. He also lectures at the annual IT Law Summer School in Cambridge.

Prior to his current role, Mark was the the firm's UK Managing Partner.

Professional QualificationsSolicitor of the Senior Courts of England and Wales



Mark leads DLA Piper’s relationships with British Airways, Vodafone, LEGO and KPMG. Other clients he advises include National Grid, Close Brothers and the MOD.

He has led on the following deals: 

  • The International Airlines Group Hybrid Cloud digital transformation project (including deals with vendors including Oracle, TCS, IBM, BT and Atos)
  • National Grid's ADAM framework establishment
  • The MoJ Future IT Services procurement (acting for preferred bidder Lockheed Martin)
  • The Pensions Regulators Employer Compliance Regime competitive dialogue

He has also:

  • Acted for Ofsted for 10 years, originally engaged for Ofsted's competitive dialogue procurement for Early Years Inspection Services and latterly advising on cloud strategy, re-procurement strategy, web site redesign and other commercial matters including the creation of template contracts for the regulator
  • Acted for QCA and QCDA from 2006 to its closure; originally engaged for the Minerva Project for the QCA to establish the new Diploma for vocational study, and latterly advising on a range of commercial and IP matters and on the commercial aspects of closure and transfer
  • Led a team of 100 lawyers in consortium with PwC and Landwell for the Cabinet Office's Admin Burdens Reduction Project: the first baselining of the administrative burden represented by UK legislation

    Awards and recognition

    • Ranked lawyer, Information Technology, London and Outsourcing, UK-wide, Chambers UK 2022 

    Publications and Media

    • Introducing our European Technology Index 2020, 30 July 2020
    • Author of the UK edition of Information Technology Transactions – Business, Management and Legal Strategies (Sweet & Maxwell), originally by Canadian lawyer Duncan Card
    • Contributing editor for the Computer Law and Security Review

    Memberships And Affiliations

    • Chair of DLA Piper's London Client Group
    • Chair of the Society for Computers and Law
    • Society for Innovation, Technology and Modernisation (SOCITM)
    • SOCITM Open Source Group