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Martin is Head of Z&Co’s transactions practice and has been based with the firm in Riyadh since 2013. His experience prior to joining to Z&Co. includes working in the corporate department at Slaughter and May in London. He received his law degree from the University of Oxford, BA in Jurisprudence and is admitted as a Solicitor in England and Wales. Martin has considerable experience of advising clients in a wide range of matters including corporate and commercial, capital markets, bank finance and foreign investment transactions, with a particular emphasis on corporate acquisitions and joint ventures.

Osama Kurdi leads the Tax Advisory and Disputes practice at Z&Co., bringing years of extensive practical experience in Saudi taxes. His background spans both public sector the General Secretariat of Zakat, Tax and Customs Committees (GSTC) and the private sector, including global big four accounting firms such (EY Saudi Arabia and PwC Saudi Arabia). Osama was also seconded to the United States to work in US taxation at EY’s Washington office. 

Osama led the indirect tax disputes and resolutions at the General Secretariat of Zakat, Tax and Customs Committees, where he applied best global practices in tax dispute resolution, aimed at efficient adjudication of tax disputes, improving efficiency, and contributing to the implementation of tax systems to enhance the confidence of taxpayers and investors in the Kingdom. He also provided comprehensive support and consultancy to tax committee members. 

At the big four accounting firms, he provided numerous specialized tax and Zakat services, including consulting, compliance, and litigation services for a variety of local and international companies in various tax fields. He also conducted specialized workshops and contributed to supporting U.S. taxpayers at EY’s Washington, D.C. office.

Reina joined Z&Co. in August 2024, having come from a strong private practice and in-house background and over 14 years’ experience.  

Reina specialises in all aspects of corporate and commercial contracts and advisory, including market entry and localisation, commercial and operational contracts and negotiations, real estate, procurement, competition risk management, intellectual property, data privacy and cybersecurity, employment and ESG regulation.

A solicitor qualified in England and Wales, Reina has gained extensive experience from both client-facing and in-house perspectives and has worked with local and international businesses across various sectors, including construction, transport & logistics, infrastructure, FMCG, healthcare, financial services, pharmaceuticals, and retail.

Prior to joining Z&Co., Reina worked across a variety of commercial and corporate advisory practices in London, Dubai, Switzerland and Saudi Arabia. After spending 5 years at Linklaters LLP (where she began her career) Reina served as Senior Legal Counsel at Nestlé Nespresso S.A. / Nestlé S.A. managing all legal support for the commercial, operational and product development functions globally. Reina also served as General Counsel of a regional construction and contracting group, where she was esteemed for her achievements in commercial negotiation and alternative dispute resolution. Most recently, Reina returned to private practice as Legal Director at Clyde & Co. LLP based in Riyadh and Dubai, where she was commended by her major commercial and logistics clients for her support on complex commercial projects – particularly in relation to logistics and infrastructure. Clients refer to Reina as “integral” to the successful completion of their projects.

Sarah Gonem is a Partner at Z&Co., who co-heads our Dispute Resolution practice area.  

Having joined Z&Co. in 2014 from the London office of a leading US law firm, Sarah primarily focuses on disputes involving international parties or cross-border issues. 

Sarah is currently ranked as a Leading Partner by the Legal500, which reported in its latest edition that that Sarah is “extremely clever, available and easy to work with”. She is also ranked in Chambers Global, Band 2, which states “Sarah Gonem is an experienced lawyer who is well placed to advise international clients on disputes proceedings in Saudi Arabia.” Clients also comment that she “stands out for her analytical ability, communication skills and responsiveness.”

Sarah Sadek holds an LLM from University College London (UCL), specialising in International Law. She is dual-qualified as a Solicitor Advocate and Barrister-at-Law in England and Wales, enhancing her advocacy, advisory, and strategic capabilities. 

Sarah’s core practice covers government advisory, regulatory frameworks, comparative law analysis, and legislative drafting. Prior to joining the firm, Sarah served as an Advisory Lawyer at the Ministry of Justice in the United Kingdom. In that role, she led critical initiatives involving complex policy analyses, strategic drafting of regulatory instruments, interdepartmental coordination, and legal strategies underpinning public engagement and transparency. Her expertise further includes incorporating international best practices derived from comparative research and benchmarking to support robust and effective regulatory frameworks.