|Claude Lambert is IT Consultant, president of S&O, vice-president of EUS, trainer at G.I.R.O.S. (Belgium), initiator of "Complexitude Workgroup" (France) I am Belgian and was born in 1966. In 1987, two years after graduation, I become analyst-programmer in the economic science. In 1992, after several professional years as employee, I launched a computer company (Prosoft Sarl) whose activity is business software development for small and medium-size firms. I'm still freelance IT consultant. Between 1997 and 2009, besides my professional activity, I work as a volunteer in an organization whose part of the activities take place in Africa. During these ten years, I organized with others the implementation of structures supporting humanitarian projects in the fields of training, health and community activities. In 2007, both my professional activity and my voluntary commitment in Africa lead me to start on a new training period: in 2009, I become certified in coaching in Grand Duchy of Luxemburg. It is during this training that I discovered systems science. In 2010, I take on a training as intervener in systemic approach in organization with the GIROS independent institute in Belgium. In that same year 2010, I get in touch with Gérard Gigand, following a first reading of the book "Complexity as a cultural enlightenment". Since my participation in a cycle of three seminars, we collaborate in the development of the "Complexitude Work-group". I joined the G.I.R.O.S in 2012. team. Since then, I participate as a trainer, researcher and systemic intervener.