Derko Den Otter is a Gecertificeerd NT2-docent at NLtraining. They is proficient in Spanish, English, French and German. Colleagues describe them as "When i was Managing and Commercial Director with Saint-Gobain Cultilene BV, I learnt to know Derko as a very driven and structured colleague. After thorough market research, he started looking for distributors in order to open a new market for the company. In those years the export turnover of Saint-Gobain Cultilene grew considerably thanks to a.o. his efforts. For this purpose, Derko travelled around the world and as a result he learnt to know many different cultures thanks to his mult-lingual skills. Personnaly, I have enjoyed the co-operation with Derko very much." and "If you are looking for an international sales manager in the agricultural/chemical sector I can recommend you Derko den Otter. I do know Derko from the very beginning of his career and having been his manager for quite some time I have noticed that Derko has developed himself as a senior sales manager with excellent skills and know-how. He has travelled all over the world and has built up a substantial international network."