Sierk Coolsma

Sierk Coolsma is a seasoned professional in commercial management and sales, currently serving as Senior Commercial Manager at Protium, the UK's largest developer of electrolytic hydrogen projects since August 2024. Previously, Sierk held various leadership roles, including Sales Director at HyGear, where the focus was on sustainable industrial gas solutions, and Voorzitter at DSV Concordia, Delft's largest sports association. Sierk also contributed to a startup in the CBD market as a Sales Marketing Consultant and held multiple senior positions at iBasis and KPN, managing strategic accounts and driving sales across various regions. Sierk's academic background includes an MBA in International Business Development Management from institutions such as Windesheim, Boston University, and INSEAD.