In 2011, Derin made equestrian history for Turkey by taking the individual silver medal at the European Championships for juniors
In the beginning of 2012, Derin moved from Turkey to train with Bert Romp and Jos Lansink. In April 2012, Derin started training with Henk Nooren and moved with his horses to Nooren's Stables in Belgium before he ventured out on his own in 2016 and moved his horses close to Maastricht, Netherlands. Derin currently manages his own stables, but will as of the summer of 2020 join Carpe Diem Equestrian Team in Baarlo, Netherlands.
Besides being a successful showjumper, Derin has also been pursuing his studies at Maastricht University since September 2012 and got his degree in International Business with a major in Finance in 2015.
At the beginning of 2017, Derin also graduated from the Young Riders Academy-team of 2016 – after participating a year in the educational program.
With his long-time partner Harry K, Derin won the 2017 CSIO3* Grand Prix of Drammen as well as the 2016 CSI4* FEI World Cup of Doha. The pair was also on the winning Turkish Nations Cup team at CSIO3* Sopot back in 2014. Aboard Dadjak Ter Puttenen, Derin won the 2018 CSI3* 1.50m Grand Prix at the Toscana Tour.
Derin's current top horses are Dadjak Ter Puttenen and Koblenz vd Middelstede while his rising stars include Hunter, Scenorrado vd Hunters Z and Faline des Chaines.
4th in the CSI3* 1.50m in Samorin, Slovakia aboard Harry K
4th in the CSI2* 1.45m in Wieze, Belgium, aboard Harry K