Gaynor joined CLS in November 2013 as Head of London Legal and became General Counsel in January 2017, based in London.

As General Counsel, Gaynor is responsible for overseeing and leading the Legal Division globally, including management of data protection and regulatory relations. Gaynor was Called to the Bar of England and Wales in 1994. Following completion of Pupillage in a commercial regulatory practice, Gaynor started her financial markets career at J.P.Morgan. Since then Gaynor has held positions within the legal departments of a number of major investment banks in London, including Deutsche Bank and BNP Paribas. Prior to joining CLS, Gaynor was a Director and Associate General Counsel at Bank of America Merrill Lynch in London, with primary responsibility for legal support of the rates and FX business lines. As well as being a regular speaker at ISDA conferences, Gaynor is a current member of Gray's Inn, the Chair of the Bar Association for Commerce, Finance & Industry (BACFI) and a member of the Bank of England JSC Legal Sub-Committee.