Rajkumar was born in 1971, in Bastar district of Chhattisgarh, India. Between 1992-1996 Rajkumar learnt wood and stone carving under Raituram, a master craftsperson at the Shilpi Gram in Kondagaon. He went on to assist him in the executions of various commissioned works and participated in a number of training programs and craft workshops and fairs sponsored by government organizations like Lalit Kala Akademi and Handicrafts Board, India. It is around this time he became the founding member of Dialogue Interactive Artists Association (DIAA) in Kopaweda, where he serves as the President currently. Some of his collaborative projects are Chawal ki Kahani: A workshop with students from two high schools in Kondagaon, Bastar –1997; Pilla Gudis is a project in collaboration between artists and community members in Bastar since 2000; Nalpar is one public place since 2000. Besides this, Rajkumar has organized art workshops for local school children at Pilla Gudis at Kusma, Kopaweda and Shilpigram, Kondagaon. As part of DIAA, Rajkumar has been organizing art workshops for neighbourhood children at Pilla Gudi in and around Kopaweda with Rajkumar, Gessuram, Navjot Altaf, and other local Adivasi artists. He participated in a Seminar Samvad 3, Value [of] nature, organized by DIAA- Dialogue Interactive Artists Association Kopaweda Kondagaon Bastar (2015), and presented a paper Where do Adivasi Artists Stand in a Seminar Samvad 2, What is Contemporary in Contemporary Art, organized By DIAA- Dialogue Interactive Artists Association Kopaweda, Kondagaon, Bastar (2011).  

Rajkumar has widely exhibited his artworks in India and abroad. His solo exhibitions include an Exhibition of Sculptures and Acrylic on Paper, Sakshi Art Gallery Mumbai (2007). His important group exhibitions include Sculpsit: Between Thought and Action, at The Guild, Alibaug, (2019) curated by Sasha Altaf and at Sunaparanta - Goa Centre for the Arts, Goa, (2019) in collaboration with The Guild; Starting from the Desert: Ecologies on the Edge. Curated by Marco Scotini, 2nd Yinchuan Biennale, Museum of Contemporary Art (MOCA), Yinchuan, China (2018); Not under Great Law, not under Sacred Law, The Guild Alibaug (2016); Edge of Desire: Recent Art in India, curated by Chaitanya Sambrani (Perth, New York, Mexico City, Monterrey, Berkeley, New Delhi,  Mumbai 2004-07) and a seminar to coincide with Edge of Desire: Recent Art in India exhibition at National Gallery of Modern   Art in New Delhi; Modes of Parallel Practice: Ways of World Making, Interactive project at Shilpi Gram with Navjot Altaf and Bhanumati Padamsee, Kabiram and Gessuram at Sakshi Art Gallery Mumbai and Fukuoka Asian Art Museum, as part of Asian Art Triennale, Communication: Channels for Hope, Fukuoka, Japan, curated by Raiji Kuroda (1997-1998). 

Rajkumar lives in Kopaweda and works at DIAA in Kopaweda, Kondagaon, Chhattisgarh.