Nicolas Trean starts his professional path in 1998 as an engineer with "Ismeka", a Swiss semiconductor production company. Soon after this he is appointed as a project manager at the same company for the developement of microelectronics equipement. Later he continues his career with the Belgian "Expect" company, part of the "Elex Group", base in Switzerland. He is responsible for the global clients service support. From 2003 to 2007 Nicolas Trean works for Melexis Bulgaria, a manufacturer of micro chips for the automotive industry, where he holds the position of general manager, responsible for more than 400 employees and the operation of a major investment project.
In August 2007 he joins the Kumerio Group as a general manager, today known as Aurubis, which was proclaimed in 2012 as the second biggest Bulgarian company by revenue and the most profitable metallurgical producer in the country.

Andrei Tsekov is General Manager, Vice-Chairman of the Managing Board and Chief Legal Adviser at Glavbolgarstroy Holding. He graduated in law at Sofia University, has specializations in European business law from Amsterdam University and management from Stanford Graduate School of Business. He works for Glavbolgarstroy since 2000.
Glavbolgarstroy Holding is the largest Bulgarian construction company, with more than 40 years in experience as main contractor for public, housing, industrial and infrastructure facilities and ecological projects. Among the current significant project the company is involved in are the construction of Sofia South Ring Mall, the judicial Palace in Pristina, Kosovo and the highway track on "Struma" highway between Dupnitsa and Dolna Dikanya.