Who we are.

Maillance was founded in 2017 to leverage the possibilities of artificial intelligence to further digitize the oil and gas industry. Our team is made of industry veterans from Schlumberger, Baker Hughes, Microsoft, and General Electric.


Jean-Paul Dessap

Founder & CEO

Jean-Paul is a proven industry leader in oil and gas software technology. He is interested in creating differentiating value through software. A reservoir engineer by training, his 21-year track record at Schlumberger boasts consistency in results at the helm of some of the most ambitious software technology transformation programs in E&P, including INTERSECT, Ocean and Kinetix†.

Jean-Paul is a pioneer in the application of data science to understand ranges of drilling and completion parameters that optimize production. He is the first inventor of three patents (one granted, two pending) and second inventor on three patents (pending), all in petrotechnical software, cloud, mobility and data science applications. Jean-Paul holds an MSc in reservoir & geosystems engineering from the University of Texas at Austin and an MBA in Management from the Rotterdam School of Management.

† Products of Schlumberger

Charles-Edouard Cohen

Chief Scientist

Charles specializes in the creation of mathematical models and simulation tools to solve and optimize industrial challenges. In his 14 years of experience in the oil and gas industry, much of it spent at Schlumberger, he has developed the state-of-the-art of technologies in matrix acidizing and reservoir stimulation, including his most recent role as a key developer of Kinetix†.

His competencies spread over a large range of disciplines and domains, from software development through high performance computing to machine learning, and from fluid mechanics through geomechanics, to acid stimulation and hydraulic fracturing. This versatility is illustrated by his invention of 6 patents (3 granted, 3 pending), as well as his authoring of 22 technical publications.

He boasts 1,291 citations on Google Scholar and has earned professional awards and accolades. Charles holds an MSc in Fluid Mechanics and a PhD in Petroleum Engineering from Institut Français du Pétrole (IFP).

† Products of Schlumberger

Yasin Hajizadeh

Chief Technology Officer

Yasin is accountable for empowering and delighting our customers by leading long-term technology strategy and planning, product roadmap, and innovation initiatives. Prior to joining Maillance in 2020, he was a senior program and product manager of machine learning and IoT platforms at Microsoft, Redmond. Yasin also spent 5 years with Schlumberger as a reservoir engineer and data scientist in Canada, UK, and the US. He is an adjunct associate professor of computer science at the University of Calgary and has published extensively in the intersection of data science and energy industry. Yasin holds a PhD in Petroleum Engineering (2011) from Heriot Watt University, and a Masters in Technology Management (2016) from Memorial University of Newfoundland.

Sebastien Condom

Chief Operating Officer

Sebastien has spent more than 25 years in the oil and gas industry with General Electric and Baker Hughes where he held various field and executive positions in product leadership, global P&L, business units digital transformation, sales, and company affiliate’s CEO. Before joining Maillance, he was the Chief Commercial Officer of the Baker Hughes digital division headquartered in San Ramon California. He was in charge of the global sales of IoT software, advanced analytics, and AI solutions for the oil and gas industry. Sebastien holds an MSc in mechanical engineering from the Ecole Nationale Superieure d’Arts et Metiers and an MBA from the Institut d’Administration des Entreprises d’Aix-en-Provence.


Thierry Pilenko

Former Executive Chairman of TechnipFMC

Mr. Pilenko stepped down from TechnipFMC in May 2019, having served as its Executive Chairman since 2017. He has extensive experience in the energy sector, including several leadership positions. He served as Chairman & CEO of Technip S.A. from 2007 to 2017; Chairman & CEO of Veritas DGC Inc., from 2004 to 2007; Managing Director of SchlumbergerSema, a Schlumberger Ltd. Company, from 2001 to 2004; and President of GeoQuest, another Schlumberger Ltd. Company, from 1998 to 2001. He joined Schlumberger in 1984 where he held various international management positions.

In addition, Mr. Pilenko has served and continues to serve on several boards of companies active in the energy industry and beyond.