OSE, being one of the leading construction companies, has worldwide expertise in the construction of rigid and flexible pavements for roads, highways, and airfield. Its expertise extends to bridges, flyovers, and embankments with reinforced earth and earthwork.

In the 45 years of its existence, OSE has executed pavement works, both rigid and flexible, at 39 Airfield and major National / State Highway projects in India and abroad, having executed contracts for such esteemed clients as the National Highways Authority of India (NHAI); the Ministry of Road Transport & Highway (MoRTH); Roads & Highway Department; Govt. of Bangladesh; the Indian Air Force; Central Public Works Department; Airports Authority of India; State Public Works Departments and reputed corporate bodies such as Reliance Utility Engineers Pvt. Ltd.; Jaiprakash Associates; GMR Group; Tata Realty & Infrastructure Ltd.; IL&FS and IRB Infrastructure Developers Ltd.