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Charis Tan

Charis is tri-qualified (Singapore, England & Wales and New York) and has specialised in international arbitration her entire career. Her practice straddles international commercial and investment treaty arbitration and public international law. She trained under Senior Counsel Michael Hwang, before joining an international firm where she worked with one of the top teams in the world for public international law and investment treaty arbitration. In 2020, she joined Peter & Kim, launching the Singapore office. Her experience includes international commercial and investment arbitrations under the rules of major arbitration institutions, including ICSID, ICC, SIAC, HKIAC, KCAB, AIAC and SCC, as well as ad hoc proceedings under UNCITRAL Rules. Charis is appointed as Counsel and Arbitrator, and she has also served as an arbitrator in WTO trade proceedings. She regularly acts for States, and has represented them in ISDS proceedings and high-profile State-to-State disputes before the International Court of Justice (ICJ). Her cases almost always involve complex multi-layered disputes involving the interplay between commercial relations, regulation, policy, and domestic and international law. Charis has been referred to as “formidable arbitration counsel”, with “great familiarity with the rules and personas involved” and “very deep technical international arbitration expertise“, “simply outstanding” and “an amazing practitioner“, recommended by Lexology (formerly Who’s Who Legal), Global Arbitration Review (GAR), Legal 500 and Chambers amongst others. An initiative she spearheaded for the training of Government officials was awarded the Asia Pacific FT Innovative Lawyers Award. Previously Charis taught adjunct at the National University of Singapore (NUS) for almost a decade. She is co-editor and author of Investment Protection in Southeast Asia, A Country-by-Country Guide on Arbitration Laws and Bilateral Investment Treaties (2017), Jus Mundi’s Wiki Notes on Investment Law and Arbitration (2021), and Practical Public International Law and its Implications for Businesses (2025). AREAS OF EXPERTISE Arbitration Public International Law Private International Law International Investment Law Joint Ventures / Consortia INDUSTRY SECTORS Oil Gas Energy & Power REPRESENTATIVE CASES Appointed on a WTO Panel to determine a trade dispute between the European Union (EU) and the United States (US) relating to anti-dumping and countervailing duties. On the Counsel team for Colombia in two International Court of Justice (ICJ) cases brought by Nicaragua relating to delimitation of the outer continental shelf and alleged violations of sovereign rights and maritime spaces. Representing the Government of Vietnam in two investor-State cases brought by Chinese investors arising out of a construction project. Acting for an Eastern European State in a high-profile commercial arbitration under UNCITRAL Rules arising out of the construction of a trans-border highway, a project worth €1.4 billion. Acting for a South Asian State in an ad hoc UNCITRAL commercial arbitration between an investor and a State in relation to a concession over an airport, in a claim worth more than US$1 billion. Representing an Indonesian oil company in an ICC arbitration for failure to supply gas under a significant contract, resulting in a claim for more than US$500 million. Appointed as a Presiding Arbitrator in an SIAC arbitration relating to the sale and purchase of commodities involving multiple jurisdictions. Lead Counsel in an ICC arbitration in a claim brought by a French investor against an investment company based in Vietnam. Lead Counsel in an SIAC arbitration between a Chinese company and Singapore-based private equity fund relating to investments in the food sector. Co-Lead Counsel representing a listed American renewables company in its claim against a supplier of solar panels in a dispute worth almost US$200 million under SIAC Rules. Acting for a Chinese State-owned entity in an SCC arbitration concerning a consultancy agreement against a Middle Eastern management company in relation to a petrochemical project worth US$750 million. On the Counsel team for Peru in the ICJ case of Peru v. Chile relating to maritime delimitation. Represented a Middle Eastern State in three inter-related ICSID arbitrations relating to investments in ports and customs systems. Counsel for an Eastern European State in an ICSID arbitration involving a longstanding investment in a motorway in Europe. RANKING 2025 – Lexology Index: Arbitration 2025 – Chambers and Partners, Dispute Resolution: Arbitration (Asia-Pacific) 2024 – WWL Global Elite Thought Leader, recognizing the top practitioners globally, achieved by only around 5% of WWL-listed professionals. 2023 – Who’s Who Legal: Arbitration 2023, listed among the “Most Highly Regarded” Partners in Asia Pacific. 2022 – Who’s Who Legal (Southeast Asia). 2022 – The Legal 500 Asia Pacific 2022. 2022 – Who’s Who Legal: Arbitration 2022, Future Leaders (Partners). 2021 – Who’s Who Legal (Southeast Asia). QUOTES WWL (Southeast Asia, 2021) says: Charis Tan is a “formidable arbitration counsel”, according to sources who laud her “very deep technical international arbitration expertise” and “great familiarity with the rules and personas involved”. Global Arbitration Review quotes a client as saying that Charis was “simply outstanding”. Who’s Who Legal names Charis as a “Future Leader” in arbitration (2022): “Charis combines deep technical expertise together with a profound understanding of the client’s commercial goal” “She is a practical and effective lawyer” “She distils complex legal concepts in a highly palatable manner” The Legal 500 Asia Pacific (2022) highlighted Peter & Kim in Singapore as a “firm to watch”, stating: “Peter & Kim‘s Singapore international arbitration practice was set up by Charis Tan… in April 2020. Tan is tri-qualified in Singapore, England & Wales and New York and has particular experience in international arbitration and public international law and advises States in investment treaty disputes.” In 2023, Chambers and Partners ranked Peter & Kim Singapore in Band 1 among highly regarded firms for arbitration. Who’s Who Legal (2023) named Charis among the “Most Highly Regarded” partners in Asia Pacific: “An amazing practitioner”

Peter & Kim

Charissa Ball

Charissa Ball is counsel in the corporate and finance team at Carey Olsen Bermuda. Charissa advises on all aspects of commercial and corporate law and regularly represents clients on a wide variety of local and cross-jurisdictional corporate and regulatory transactions and restructurings. With a practice spanning a number of specialisations, Charissa has particular experience in corporate reorganisations, mergers and acquisitions, debt restructuring, redomiciling, joint ventures and debt and equity offerings. She also has considerable experience in corporate finance including IPOs, private equity investments and banking and financial services including, financial derivatives, credit and security. Charissa is also a senior member of the Carey Olsen fintech team. She has assisted numerous digital asset business companies by advising on the licensing and ongoing regulatory requirements of digital asset companies, including the requirements of Bermuda's anti-money laundering, anti-terrorist financing and sanctions regimes.

Carey Olsen Bermuda Limited

Charl Jonker

Partner

Webber Wentzel

Charl Williams

Charl is a Director of our Corporate & Commercial practice. He advises on all aspects of South African corporate and commercial law including listings, mergers and acquisitions, corporate finance, establishment of new businesses, property-related transactions, and broad-based black economic empowerment transactions.

Cliffe Dekker Hofmeyr

Charlaine Adrienne Chin

Partner; Dispute Resolution; Medico-Legal

Raja, Darryl & Loh

Charleen O\'Keeffe

Charleen is a partner in our Disputes and Investigations Group, specialising in Intellectual Property (IP) and regulatory law. Charleen works with a wide range of national and multinational clients, from global life sciences and healthcare companies, to leading consumer goods companies. She is a recognised leader in the life sciences sector, with a particular expertise in the intersection of regulatory law, competition law and patent litigation. As a skilled litigator, Charleen brings extensive experience in guiding clients through complex Irish and multi-jurisdictional IP disputes. She advises leading global companies including innovator pharmaceutical, biotechnology, and medical device companies in high-stakes international disputes. By providing strategic local advice and representation, Charleen and her team serve as a critical component in cross-border disputes. Charleen joined Matheson in June 2026 from another large Irish law firm, where she had been a partner since 2020. Charleen advises clients in the life sciences sector on every phase of a product’s life cycle from product development, clinical trials, data exclusivity, regulatory approval to commercialisation and product safety / recall / liability. She is a lecturer on the Law Society of Ireland’s IP Diploma and PPC courses and has been recognised for several years by the leading directories for her work in Life Sciences and Healthcare and in IP.

Matheson LLP

Charlene Azema

Partner

Knobbe Martens Olson & Bear LLP

Charlene Hiller

Partner

Bennett Jones LLP

Charlene Mifsud

Partner, Corporate & Commercial

Chetcuti Cauchi Advocates

Charlene Nelson

Charlene is a Chartered Trade Mark Attorney in our Intellectual Property team with over 10 years’ experience in the field. She assists clients in navigating through the complexities of trade mark and design right registration procedures around the world. In particular, she helps clients obtain a balanced and cost-effective portfolio of rights to enable them to support their strategic and commercial objectives and place them in the best position to avoid and resolve disputes quickly. Further, she regularly conducts clearance searches in the UK and elsewhere to ensure that new brands are free to use. Over the years, she has worked with a variety of different sized clients across different sectors and enjoys getting to know clients and understanding their businesses in order to provide targeted and bespoke advice. Charlene is an active member of ECTA and represents the UK on the Publications Committee.

Foot Anstey

Charlene Sun

Partner

DLA Piper LLP (US)

Charles (Chuck) Knauss

Partner

Hunton Andrews Kurth LLP

Charles (Chuck) Kotuby

Chuck is Of Counsel based in the firm’s Washington, D.C. office. His practice focuses on international commercial and treaty-based arbitration, transnational litigation, and public international law.

Three Crowns LLP

Charles Abitbol

DLA Piper

Charles Adams

Charles Adams is a dual qualified avvocato (Italy) and solicitor (England & Wales) who is widely recognised as one of Italy's leading banking and finance lawyers. Charles has advised banks and borrowers on some of the most significant syndicated loans, leveraged and project finance transactions in the Italian market over the past 20 years. He also advises clients on major Italian restructurings and insolvencies and is active in the Energy sector, having advised on some of Italy's landmark infrastructure and project financings and more recently on renewables transactions.

Clifford Chance

Charles Allen

Partner & Head of Hong Kong office

RPC

Charles Andersson

Partner

Advokatfirman Schjødt

Charles Arbro

Partner

CMS Wistrand

Charles Arrand

Charles is an experienced regulatory crime solicitor advising corporations and their directors on investigations, prosecutions and other enforcement actions in relation to the offences which can be committed by companies, including bribery and corruption, environmental, waste and nuisance, corporate manslaughter, health and safety, trading standards, animal welfare, pricing and promotions, food labelling, food hygiene and food safety, weights and measures, Coroner's inquests, product recall and product safety etc. Charles has over 20 years’ experience in pretty much all sectors but in particular - retail, food and drink, hospitality and leisure, manufacturing, rail, construction, property and facilities management, automotive, government and defence, mining, transport, warehousing and logistics, and healthcare and acts for individuals as well as many well-known global and high street businesses. Charles is acutely aware of reputational risk/brand protection and is used to having to act and advise in high profile matters. Charles is ranked locally and nationally in various legal directories over many years, and is a regular speaker at seminars and events, a provider of bespoke training for clients and umbrella bodies, a writer of articles on various subjects within his expertise and a reviewing editor of leading textbook Consumer and Trading Standards: Law and Practice.

Shoosmiths LLP

Charles Atkins

Partner and Head of Department since joining Gordons in 2007. Work undertaken includes defending claims of clinical negligence, representing clients at Inquests and Inquiries and representing professionals before their Regulatory bodies.

Gordons Partnership 2020 Limited

Charles Avens

Partner - Head of Immigration

Collyer Bristow LLP

Charles B Walker

Norton Rose Fulbright

Charles Bardou

Partner

Dentons

Charles Bond

Partner, Head of Capital Markets Natural Resources (UK)

Gowling WLG