Executive Team

Meet our Executive Management Team

People Didier Bouillard

Didier Bouillard

Chief Executive Officer

Didier Bouillard serves as the CEO of AxiomSL and Calypso following the merger of the two companies in July 2021. Didier joined Calypso as CEO in April 2018 and is based in London. Prior to Calypso, Didier served as CEO of Ullink, global provider of connectivity and trading services, beginning early 2015. The main objective of the assignment was to merge NYFIX, acquired by Ullink late 2014, and to transition the overall group from a founder led business into a professionalized Private Equity owned business. After experiencing multiple years of steady growth of revenues and profits Ullink was successfully sold to Nordic Capital backed Itiviti. Prior to Ullink Didier was Executive Vice President at Sungard Financial Systems (now part of FIS) and operated a substantial part of the Capital Markets and Electronic Trading division, playing a key role in the global distribution.

Didier started his career in the 1990’s and has been part of successful entrepreneurial ventures providing leadership as partner, Managing Director and CEO (Ubitrade, Capital Fund Management, Fermat) where he gained extensive knowledge of the capital market industry as well as a true international exposure.

Didier graduated from Ecole Nationale des Ponts et Chaussées in 1988.

People Helene Koutsoudakis

Helene Koutsoudakis

Chief Financial Officer

Helene Koutsoudakis is the Chief Financial Officer, responsible for enterprise-wide oversight of AxiomSL and Calypso’s financial operations, including financial planning and analysis, driving commercial and operational improvements, and managing relationships with our stakeholders. Prior to this role, Helene served as an Operating Partner at HG Capital supporting their portfolio businesses in the software and broader technology sectors. Previously, she was with Advanced Computer Software Group as Group Finance Director where she played a pivotal role in the sale of the business to Vista Equity Partners in March 2015.

Prior to that, she spent over 8 years with COA Solutions (acquired by Advanced Computer Software Group) as Group Financial Controller responsible for leading the integration process of COA solutions into the larger Advanced Software Group. Helene earned a degree in Accounting from the Rand Afrikaans University (now University of Johannesburg) in 2001 and ACCA qualification from The Association of Chartered Certified Accountants in 2005.

People Mayank Shah

Mayank Shah

Chief of Staff

Mayank Shah is Chief of Staff of AxiomSL and Calypso, where he is responsible for strategic partnerships, marketing, sales operations, operational board reporting and transformation initiatives.

Prior to joining Calypso, Mayank served as Senior Product Manager at Citadel Technology, the technology subsidiary of Citadel Investment Group. Previously, Mayank has been an Associate Partner at IBM and Senior Manager at BearingPoint (ex. KPMG Consulting), managing strategy and transformation projects at global financial services institutions.

Mayank holds an MBA from the University of Maryland, College Park, USA and a Bachelors degree in Mechanical Engineering from Bombay University, India.

Josh Geller

Joshua Geller

Chief Legal Officer

Joshua Geller is the Chief Legal Officer of AxiomSL and Calypso, where he is responsible for all legal matters. Joshua joined AxiomSL in 2017.

Prior to AxiomSL Josh was a partner in the Corporate Department of Curtis, Mallet-Prevost, Colt & Mosle LLP where he was a member of the Mergers & Acquisitions, Private Client, and Investment Management practice groups, counseling clients on a wide range of strategic transactions across different industries. Josh joined Curtis as a summer associate and held associate and counsel roles before being named partner.

Josh holds a B.A. in economics from Yeshiva University, where he graduated magna cum laude, and a J.D. from Fordham University, where he was a member of the Fordham Urban Law Journal. He is admitted to practice in the States of New York and New Jersey. He is a member of the New York City Bar Association, where he serves as a member of the Trade Secrets Committee.

People Richard Bentley

Richard Bentley

Chief Product
and Engineering Officer

Richard Bentley joined Calypso in June 2019 as serves as the Chief Product and Engineering Officer for AxiomSL and Calypso, in which role he oversees product management, engineering and quality assurance.

Prior to joining Calypso, Richard served as Chief Product Officer for Ullink (now part of Itiviti) for five years. He was a member of the founding team of Apama (now part of Software AG) in 2000 and has also served in various product roles for capital markets technology firms over the last 20 years.

Richard began his career as a research scientist, holding roles with Xerox Research Centre (EuroPARC) and the Fraunhofer Institute. Richard holds PhD and BSc degrees in Computer Science from Lancaster University, UK.

People Laurent Jacquemin

Laurent Jacquemin

Chief Customer Officer

Laurent Jacquemin is the Chief Customer Officer, responsible for AxiomSL and Calypso’s global Customer, Professional Services and Cloud organizations.

Before joining Calypso, Laurent led FIS’ global Post-Trade-Processing business, as a Division Executive. Prior to this role, he spent nearly 7-years with Sungard Financial Systems as the Global Head, then the EVP and then the Group President of Post Trade Derivatives. Earlier he spent 3 years with GL Trade as a Managing Director and 11 years with Ubitrade in a variety of management roles in Professional and Customer Services, in Product Development and Strategy and in Sales. Laurent started his career as an IT Analyst and Project Manager in the Artificial Intelligence space with GSI TESCI. He earned engineering degrees in Chemistry and Physics from Paris based ESPCI in 1988.

People Ben Fisbein

Ben Fisbein

Global Head of Sales

Ben is the global Head of Sales for Capital Market and Regulatory Solutions. He manages the sales organization globally and helps our clients in increasing their STP and making better trading decisions, while remaining compliant with current and future regulatory requirements. Prior to this role, Ben managed the North America sales organization at Calypso Technology.

Ben spent 14 years at Moody’s Analytics and Fermat before joining Calypso, where he handled numerous enterprise software sales management positions in Europe and North America, helping clients comply with risk and capital regulations (Basel and Dodd Frank mainly). Ben holds a MSc in Computer Science from EISTI (now Cy Tech) in France.

AxiomSL Ed Probst

Edward Probst

Head of Strategy,
Regulatory Solutions

Ed Probst is the Head of Strategy for Regulatory Solutions. Since joining AxiomSL in 2010 he has been instrumental in establishing AxiomSL as the industry leader for risk and regulatory reporting.

Ed previously served as Chief Product Officer for AxiomSL and was responsible for Product Strategy, Market Strategy, Engineering, Quality Assurance and Pre-sales. Before assuming the role of CPO, Ed was General Manager of North America, where he was responsible for Product, Sales, Pre-Sales, Services and Support for the region.

Having spent more than 15 years in the FinTech sector in various leadership roles, Ed brings hands-on experience in technology, regulatory reporting and risk management to the organization. Prior to joining AxiomSL, Ed spent more than a decade in RegTech focused on data, risk and regulatory.

Ed holds both a BSc in Mathematics and an MBA in Finance and Economics from Baruch College.

People Gil Guillaumey

Gil Guillaumey

Head of Strategy,
Capital Market Solutions

Gil Guillaumey is the Head of Strategy for Capital Market Solutions, a role he assumed when he joined Calypso in January 2018 to oversee Presales, Go-to-Market, and Product Marketing activities for Calypso’s solutions.

Gil has spent three years as Head of Strategy at Ullink, four years as Head of Presales at Murex, and ten years at Moody’s Analytics, where he oversaw the Fermat Regulatory Calculation and Reporting product suite’s European Sales & Presales teams.

Gil began his career at Accenture, where he managed application development teams for the TMT business line. Gil holds a MSc in Computer Science from Centrale-Supelec, Paris.

Karoline Raets, Chief People Officer

Karoline Raets

Chief People Officer

Karoline Raets joined the newly formed AxiomSL and Calypso entity in August 2021 as Chief People Officer, overseeing HR tools & systems, talent acquisition, employee engagement, Internal/international mobility, onboarding, referral and loyalty rewards programs, performance & talent management, job leveling & titling, reward strategies, executive coaching, DE&I, ESG.

Karoline has a diverse background in Human Resources, Internal Communications, Marketing, Public & Investor Relations. She’s been working in the Fintech industry for the last 22 years. Prior to Calypso/AxiomSL Karoline served as Chief People Officer at Itiviti recently acquired by Broadridge, previously she was CHRO at Ullink (acquired by Itiviti in 2018). During her time at Sungard/FIS she was in charge of the company’s global Talent & Performance strategy and implementation.

Karoline holds a Bachelor of arts in Marketing & Communications from Hoger Handels & Talent Instituut.

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