2003-2004: Construction of 6 packages for construction of National Highway No. 6, drilling and explosion stone breaking with high technical and safety requirements.
2005: In cooperation with Lung Lo Corporation - Ministry of Defense, drill and explosion quarry, supply to Dung Quat oil refinery and Quang Ngai main port.
2006: Drilling and explosion, excavation of beach villas and marine tourism service Anh Nguyen - City. Nha Trang, Khanh Hoa. High requirements for safety for the sea cable car and Hon Tre hotel about 50 m.
2007: Drilling and explosion to open road to flood avoid, North of Tra My, A Vuong hydropower.
2009-2010: The contractor for Wolkem India opens the road to the Thung Pha Nghien white stone quarry in Nghe An province.
2011-2012: Main contractor to open the open-pit mine, white marble extraction for Omya Company (Kingdom of Belgium - Thailand).
2014-2015: The main contractor for Central Construction Group, Thanh Hoa, drilling, explosion, excavation, transport, molding, concrete pouring, finishing V-shaped road in Thanh Hoa - Hoa Binh province.
SIERRA has subsidiaries, subordinate units capable of executing works requiring high technical safety and quality: Hong Tuan and Project Enterprises were established on the basis of cooperation in technology application and production in localities.