DDI Holdings Limited, is a Bulgarian-Polish joint-venture company. The main activity is investing in natural gas transmission ... and storage structures and increasing the accessibility of natural gas on Bulgarian territory. The efforts of the holding are directed to preserving the environment and tackle climate change problems. Our project portfolio includes: “Bulgarsko shkolo” - this was the first new private school built after the collapse of Bulgaria’s communist system. Learn more on http://bgshkolo.com/ Overgas Mrezhi - the first and the biggest private natural gas distribution company in Bulgaria. Learn more on https://www.overgas.bg/ Vestitel – a telecommunications company, delivering innovative corporate services and specific telecommunication solutions. Learn more on http://www.vestitel.bg/ Overgas Engineering - is the first engineering company in Bulgaria’s gas sector, having to its credit 2 300 km of municipal gas pipelines in Bulgaria. The company is a regular member of IPLOCA. Learn more about on https://www.overgas.bg//en/77/ Gastec BG JSC - the brand name of the gas pipelines designers in Bulgaria and its neighbouring South-East European countries, known for the high professional standards of their work. Gastec Bg Joint-stock Company is established in 1995 with Dutch participation. Learn more on http://www.gastecbg.com/ read more