Founder and CEO

Harco has a 27 year career in fine art and finance. He was, prior to founding Overstone Art Services, from 2001 to 2012, Senior Executive with Christie's International as Continental European head, European Client Development head, Member of the EMEA Executive Management Team and Senior Vice President of the Impressionist and Modern Art department.

Prior to this, Harco began his career in capital markets and leveraged finance where he worked from 1989 to 1999 at Paribas, Bankers Trust, and Credit Suisse First Boston where he was in charge of Emerging Markets Group’s loan syndications and bank coverage for Latin America. He then co-founded UK's first online mortgage brokerage business, Fredfinds.com, which was sold in 2001 to AIM listed Netwindfall Ltd. Harco has an MBA from the University of Hartford and is an INSEAD AMP alumnus where he is also a regular speaker. Harco is a member of Professional Advisors to the International Art Market and an Financial Conduct Authority Approved Person.



Claude is a highly experienced banker with a 35-year career in credit trading, debt capital markets, corporate finance and wealth management. He has spent the last 15 years serving family offices, as well as high net worth and ultra-high net worth individuals. Claude spent his early banking career at Bankers Trust Company in New York, London and Asia, where he held positions such as global head of credit trading and head of capital markets. Following Deutsche Bank’s acquisition of Bankers Trust, Claude headed the consumer, retail & luxury investment banking division in Europe, after which he built and led Deutsche Bank’s family office group. In 2007 he joined UBS as co-head of the global family office group, and in 2013 he joined Kleinwort Benson, the London based merchant bank as member of the executive committee. Following KB's sale, Claude became Managing Partner of Global Family Partners, a multi-family office focussed on direct investments.




Olivia has a post graduate degree from Paris University of Law (Pantheon-Assas) and is a New York University Law School alumnus. She is a qualified solicitor in both France and the US as well as a member of the Paris and New York Bars. After 4 years in private practice with a top tier UK law firm specializing in Intellectual Property law, Olivia joined Sotheby's in-house legal department in London from 2004 to 2012 as Associate General Legal Counsel where she was involved in a variety of commercial transactions related to works of art, private cross-borders sales negotiations and contracts, art loans and bespoke auction consignments for Sotheby's clients worldwide. Since leaving Sotheby’s in London and before joining Overstone Associates as in-house counsel, Olivia has advised a number of private art collectors and galleries on various commercial legal issues and transactions affecting their collections.


Chen Chowers

Head of Operations

Chen has 10 years' experience across the art industry, in both institutional museums and the art market. She began her career with the Israel Museum, Jerusalem, as Museum Educator before holding the position of Deputy Curator for Israel's largest corporate collection with Discount Bank.

Chen has led projects for various galleries and museums, including Sommer Contemporary Art and the Louvre-Paris, prior to joining Christie's London Impressionist and Modern Art team in 2015. Chen sits on the Committee board of Young BFAMI, holds a Masters in Art History & Archaeology with Distinction from The Hebrew University of Jerusalem, and gained her MBA from INSEAD in 2018, prior to joining Overstone as Head of Operations.


JEhad Al-Ansari


Jehad has 15 years experience in technology and software engineering, in a broad range of small and large teams. He has recently led projects for Fintech and web-service startups, after having held a diverse set of roles as an engineering manager, consultant, software engineer, technical architect and project manager, to a number of large technology companies, including Symbian, Nokia, Motorola, Accenture, BBC/YouView and BT, with teams in the UK, EU and USA.

Jehad was an early advocate of Agile practices and strong software engineering principles. The last 5 years, Jehad has created his own start-up companies, having offices in UK, Middle East and Russia, and worked in leadership roles at other start-ups, building general web and Fintech services.



Client & Business Development

Martin holds a Masters of Letters in Management with Distinction from the University of St Andrews, and a Masters in Finance & Accounting with Merit from Imperial College Business School.

During his time at university, Martin held lead roles such as sector analyst and treasurer in various real-fund investment societies and clubs.

Martin has experience across numerous private banks and wealth management firms, including Rathbone Private Office, St James’s Place, and Global Family Partners. He is an active founding trustee of several charities and aid organisations.

In 2018 he joined Overstone Associates following his successful candidacy in the recruitment programme.




PR and Events

Anna has 10 years’ experience promoting art galleries, art fairs and individual artists, working with clients to deliver a holistic PR service including press coverage, events and partnerships. After gaining a Joint Honours Degree in French and Italian from Bristol University, Anna has worked for two of London’s leading fine art PR agencies, as well as in-house for a high-end Mayfair gallery and an established art fair.



Kate was Senior Administrator of the Collectibles department at Sotheby's New York from 2003 till 2006. She then became Project Assistant and Administrator of the Rugs and Carpets department in 2007, following which she was promoted to Business Process Analyst in 2009 where she worked on Sotheby’s new shipping system. Kate has a BA in History of Art from Bryn Mawr College (Pennsylvania USA), and a MA in History of Art from University College London