Serge Kampf created Sogeti with three former colleagues from Bull on 1 October 1967.

He had the foresight to offer technical and organisational consulting with customer proximity, and by 1975 Sogeti was in 21 countries and had acquired the CAP and Gemini Computer Systems services companies.

Subsequent acquisitions in America and Europe included United Research (1990), Data Logic (1990), Hoskyns (1990), the Mac Group (1991), Volmac (1992), Gruber Titze & Partners (1993), Bossard (1997), Ernst & Young Consulting (2000), Transiciel (2003), Kanbay International (2007) and CPM Braxis (2010).

At that time, Capgemini published this video tribute marking Kampf's 45 years of achievement:

Capgemini Group chairman and CEO Paul Hermelin said "Serge was an extraordinary man, an entrepreneur, the likes of which are rare. Since the early beginnings of our industry, he understood that the business value of technology comes from and through people.

"At our first meeting, I was struck by his entrepreneurial mindset, his ability to form and inspire committed teams and his unwavering insistence on high performance. I will never forget all that Serge has taught us, his quest for excellence, the intellectual stimulation that one felt in his presence, as well as his faithful and loyal friendship.

"He will be greatly missed. He created a solid framework around the values on which the company is based today."

In a letter published in Capgemini's 2014 annual report, Kampf wrote "We have always put the client at the centre of our thinking and our actions. The fundamental principle is 'take the time to listen.' The phenomenal flows of information we have today will never replace deep, eye-to-eye, human interaction. I have a reputation for being a man of few words. This is because, for me, you have to start by listening if you want the other person to hear you properly. This is vital if we are going to meet the constantly changing needs of our clients. Their expectations and their trust are the raison d'être for a services company like ours."