The Tejas light combat aircraft design and development program is being led by the Aeronautical Development Agency (ADA) of the Indian Department of Defence.
Hindustan Aeronautics Limited (HAL) is the prime industrial contractor.
The National Aerospace Laboratories (NAL), based in Bangalore, has designed and is responsible for the manufacture of the fin and the rudder and the construction of the aircraft fuselage.
The aircraft is fitted with a night vision compatible glass cockpit. The cockpit has two 76mm x 76mm colour liquid crystal multi-function displays developed by Bharat Electronics, a head up display developed by the Indian government-owned Central Scientific Instruments Organisation (CSIO) in Chandigarh.
The cockpit is fitted with an environmental control system developed by Spectrum Infotech of Bangalore.
The aircraft's electronic warfare suite, developed by the Advanced Systems Integration and Evaluation Organisation (ASIEO) at Bangalore, includes a radar warning receiver and jammer, laser warner, missile approach warner, and chaff and flare dispenser.
The Electronics Research and Development Establishment and HAL have jointly developed the aircraft's multi-mode radar.
It was planned that a new turbofan engine, the GTX-35VS Kaveri, under development by Gas Turbine Research Establishment (GTRE), would be fitted to the production aircraft. There is a delay in its development.