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Andrew Katz is a lawyer who has advised on free and open source software, open hardware and other opens for over 25 years. Formerly a software developer, he qualified as a barrister, requalified as a solicitor and is now partner and head of technology law at Moorcrofts LLP, a boutique firm specialising in corporate and technology law. He is author of the Solderpad open hardware licence, and sits on the core drafting team of the CERN Open Hardware Licence. He was Open Hardware lead for the European Commission study on Open Source Software and Hardware, published in 2021. He has taught a postgraduate Open Source Software law course at Queen Mary College, University of London, and is currently a visiting scholar at the University of Skövde, Sweden, where as part of the Software Systems Research Group he has co-authored papers on open source software, open technologies, interoperability, patent licensing and standards. He is co-author of books published by Oxford University Press, Edinburgh University Press and others. He speaks internationally, most recently delivering a keynote at the Open Compliance Summit in Japan (December 2022). He is chair of the OpenChain UK work group, past General Counsel of OpenUK, and has worked with multinational companies, governments, universities and open source foundations, as well as organisations such as the UN and WIPO.

He is also CEO of Orcro Limited, sister company of Moorcrofts LLP, which provides open source consultancy and compliance services and is an OpenChain (ISO 5230:2020) partner.