Sebastian Grundstein has been head of ROI Analytics at ROI-EFESO since 2017. He has been supporting companies in making data-driven decisions since 2012 and started his personal data journey developing simulation-based optimisation algorithms for production planning and control. As a mechanical engineer with computer science background, he focuses on bringing Data Science together with Operational Excellence approaches.

Founded in 1980, EFESO Consulting is a global management consultancy firm specialised in ensuring the perfect execution of the strategy across the client ecosystem. EFESO Consulting is also an innovator delivering a new consulting experience which combines hands-on actions with vision and human touch. Over 400 consultants, operating from 27 offices, working in over 75 countries and representing more than 40 different nationalities currently support clients on more than 900 «Progression» programmes using our unique “tandem approach”. Our «Progression» motto “Improving your results today, securing your results for tomorrow” means achieving business results faster and building the capabilities to continue to improve faster than competition. The «Progression» delivers results and capabilities working at 3 levels, first at strategic level to anticipate and deploy, second at systemic level to connect the organisation and build the winning routines in terms of capabilities, leadership, engagement and behaviours and, last, at specific level to involve everybody in executing the actions orchestrated in the plan. The success of the EFESO approach is reflected by our 90% client retention.