A graduate of Ecole Polytechnique (class of 81), and after a short period of 3 years in consulting, Olivier Dellenbach co-founded and managed his first software company NAT Systèmes in 1987, which he sold to Canadian Cognicase in 1998. In 1999, Olivier Dellenbach founded eFront, a software publisher specialising in the management of unlisted investment portfolios (Private Equity and Venture Capital), a company he managed until its sale in April 2019 to the American company BlackRock for an amount of over 1.3 billion dollars. In 20 years, eFront will become the world leader in its sector, with more than 850 employees, 800 customers, a presence in more than 30 countries through 20 offices and a worldwide revenue of more than 130 million euros. Since May 2019, Olivier Dellenbach has been managing minority or majority investments in various high-tech companies through his family holding company, ChapsHolding. Olivier Dellenbach has been a Director of Coheris since June 17, 2019 and was appointed Chairman and Chief Executive Officer of Coheris on November 6, 2019.