Arnault is a graduate of EM Grenoble through a specialized masters in Entrepreneurship (Syllabus HEC). He began his career in large groups (Michelin and Casino group), where he held cross-functional functions (purchasing, marketing, and sales), and management for 15 years. Endowed with a strong digital impregnation since 1998, he switched to entrepreneurship in 2007 by directing and co-founding several companies such as Brioude Internet (Search Marketing, 50 employees), La Machine (Graphic execution agency), Material Pro (equipment wholesaler for building professionals) and Weather Measures, the French leader in meteorology for agriculture and industry. In 2020, he coordinated the merger between Weather Measures and Weenat, a French AgTech start-up. In 2022, with a strong marketing and digital base, and a strong experience in sales and management, he joined HydroClimat as a partner and Business Development manager.