Over the years Telcom Engineering has won the trust of lots of public organizations and private companies. Some of them are listed below:
- Ministry of Interior
- Kozloduy NPP
- Directorate-General for Combating Organized Crime
- State Agency for National Security
- National Service for Protection
- Communications Regulation Commission
- Air Traffic Services Authority
- State Intelligence Agency
- State Enterprise Radioactive Waste
- Sofia Airport
- LUKOIL Neftohim Burgas AD
- EVN Bulgaria
- Bulgarian Ports Infrastructure Company
- Mini Maritsa Iztok EAD
- Bulgarian Posts Plc
- OP Parks and City Gardens
- Stomana Industry S.A
- NIKMI Jsc.
- CEZ Bulgaria
- Military Police Service
- Volvo Group Bulgaria
- Swissport Bulgaria AD
- ABB Group
- ITA Engineering
- Natsionalna Elektricheska Kompania EAD
