Based on the capacity and the availability of resources, in details, the work area of the company are Feasibility Studies,  Technical Planning, Master Plan, Construction Supervision, Project Management, and Research. With the work specialization in the area of Irrigation, River, Agriculture and Water Resources Management, Regional Development, Urban Infrastructure and Transmigration, Construction Management and Supervision, Building, Roads and Bridges Design, Transportation, Power Energy (Hydro Power, Geothermal, Mini Hydro), and Oil and Gas Pipeline.

PT Tata Guna Patria has done a lot of project packages from the Ministry of Public Work, Ministry of Home Affairs, Ministry of Marine Affairs and Fisheries, Ministry of Transportation, Ministry for The Development of Disadvantaged Regions, Ministry of Energy and Mineral Resources, Ministry of Health, PT. Jasa Marga (Indonesian Highway Corp), PT. PLN (Persero), PT. Angkasa Pura (Persero).