The 46-year-old former India half replaces controversial German Gerhard Rach who was shown the door following India's poor run starting with the Athens Olympics last August.
"The appointment is for the Azlan Shah Cup. But we will assess his performance there and take a further decision," IHF Media Advisor Anupam Ghulati said.
Rajinder, who is the coach of top institutional side Punjab and Sind Bank since its formation 17 years back, played for India in the 1982 Delhi Asiad and also in the 1984 Los Angeles Olympics.
IHF also made Narinder Pal Singh the Assistant Coach of the national team. Singh gets the honour for guding Hyderabad Sultans to the inaugural Premier Hockey League title in Hyderabad.
The new appointments come on the eve of the one-month long camp for the 34-probables selected for the Azlan Shah Cup.
Gulati said the Indian squad for the Malaysian trip would be announced a few days before the team's departure for the tournament beginning on May 26.
India's other engagement is the eight-nation tournament in Amstelveen, Holland to be played in August.