2011 - Since 04.01.2011 Transgeo Ltd. has implemented a Quality control system for certification under ISO 9001:2008, ISO 14001:2007 and OHSAS 18001:2004.

2008 - Since 01.09.2008 Transgeo Ltd. has an implemented Quality control system for certification under ISO 9001:2008.

2004 - Transgeo Ltd. has received a License No. – 000133/14.07.2004, which certifies the company for carrying out compliance assessments of investment projects and exercising supervision over construction works as per the Law on Territory Planning.

2003 - Transgeo Ltd. has become a co-founder and a member of the Bulgarian Association of Consulting Companies in Railway Construction (BACCRC), which on its own, is a member of the Business Initiative Union. Dipl. Eng. Iliya Iliev is chairman of BACCRC from its founding to 2021.

2001 - With order No. 791 from 31.08.2001 the Managing Director of the Cadastre Agency has granted the company the legal capacity to carry out works under the Law on Cadastre and Land Registry in the Republic of Bulgaria.

2000 – Transgeo Ltd. receives license No. F-342/14.02.2000 from the Ministry of Agriculture and Food for the carrying out of technical works as per the Law on ownership and use of agricultural lands, LROFLFF and the regulations for their execution.

1997 - The company is one of the founders of the Association of the Geodesy Firms in Bulgaria.

1995 - Transgeo Ltd. is the first private company in Bulgaria to receive an official permission to carry out performance measurements and benchmarking of the permanent way of the Bulgarian State Railway (BDZ) with License, issued by the National Company Bulgarian State Railway.

1992 – Founding of Transgeo Ltd. by five young engineers, sharing between them a view on the future and unmasked enthusiasm. During the years 1992 and 1993 the company successfully developed and managed to implement in the Bulgarian railways system a new method for measuring performance and benchmarking.