Technip S.P.A - Italy 
Sices S.P.A - Italy 
Sices S.A. Z.O.O - Poland 
Cordeel Bulgaria 
Arimetras - Lithuania 
GP Group Ltd 
Pentar - Czech Republic 
Saren - Belgium 
OMA S.P.A - Italy 
Aurubis Bulgaria 
Alstom - USA 
DSD Gmbh - Germany 
Mostostal S.A - Poland 
ZBIS S.A - Poland 
Master Energy - Turkey 
Strabag Bulgaria 
AMAN L.td - Switzerland 
Port Burgas 
Kronospan Bulgaria 
Air Port Burgas 
Pobeda 
Windpower Ltd 
TGO - Turkey 
Risk Engineering 
PMU 
Euromarket Group 
Planeks 
Kozlodui Ltd 
Horizont Ivanov  Ltd 
Roster Ltd 
TPP Maritza 2 
Tehnogips Ltd 
TPP Maritza 1 Austom 
TPP Maritza 3 
TPP Plovdiv EVN 
Metalinvest Remko Ltd 
Titan Zlatna Panega 
Damvent Clima Ltd 
Ataro Clima Ltd 
Glavbolgarstroi 
Bon Marin 
Neft Oil 
Frahtimpeks Ltd 
KZU Burgas Ltd 
ZSK Lozovo