Derek Mayne co-founded CrescoFin in 2019 and started the Cresco group of companies in 2011 with Cresco Capital Markets, a foreign exchange broker, adding Cresco Capital Management in 2014.

Known as Ice-Man in his early career as an engineer in offshore oil and gas production (as he specialized in sea ice, not G&T ice), he worked with Agip KCO in Kazakhstan and London and later founded Abai Resources Ltd to develop junior oil and gas in Kazakhstan. He has a PhD in Civil Engineering from the University of Calgary, where he also held an adjunct professorship.