Sajjad Keshavarzian got the PhD in Energy Engineering at Politecnico di Milano, Italy in 2017. He successfully defended his PhD thesis, based on Advanced Exergy Analysis of the Energy Conversion Systems. The work investigates the performance of the systems during the off-design working condition, as well as developing the methodology for the diagnosis purposes. In 2012 he got his Master's degree Mechanical Engineering from Politecnico di Torino, Italy and in 2004 he got his Bachelor's degree in the same field from Shahid Chamran University of Ahwaz in Iran. He gained a considerable working experience in different companies and industrial energy sectors: In 2004 and 2005 he started working in industries as his novitiate period in Neka Powerplant and Iran Industrial Pump Co. Respectively. In 2005 he was a Mechanical Engineer in Packman Co. (Fire Heater Boiler Manufacturer), mainly worked on P&ID sheets and Pressure Vessel modelling in PV Elite. In 2006 became an employee of Iranian Oil Ministry in National Petrochemical Company. He spent 4 years as a Mechanical Engineer in Maintenance Department of Borzouyeh Petrochemical Co. and dealt with piping Projects, Repair and Maintenance of equipment such as Heaters, Heat Exchangers, Floating Roof Storage Tanks, Valves, Distillation Towers, Air fan coolers,... Then he transferred to the Technical Service Department as a Mechanical Projects Engineer which mostly dealt with design and managing the piping projects according to ASME B 31.3 , performing stress analysis with CAESAER II and, investigating modifications in plant’s layout and equipment. Currently, beside his consultant activities over the energy and mechanical projects in Europe, he works in Research and Development Department of one of the largest Petrochemical plants (Aromatic Products) in the World as a responsible person for Digital Transformation Projects, Knowledge Management System Manager, and also Supervising Research Projects in the field of Energy Efficiency.