As an officer of the Indian Revenue Service, Mahendra Singh has served in various capacities in the Income Tax Department all over the country. Despite the hectic schedule of his official responsibilities, for more than three decades, he managed to carve time out to pursue his private passion for wildlife and travel photography simultaneously. A total dedication to his craft when he is out with his cameras, coupled with careful research on his subjects of choice, has helped compensate for the paucity of time devoted to this parallel endeavour. Keen to develop a deep and a sensitive understanding of his subjects, Mahendra Singh has been eager to share his experiences with a larger audience, both through his photographs and writing. He has always found time to give talks on photography, wildlife and the environment. The meaningful images created by him and the meticulously researched articles have regularly been published in various newspapers, journals and periodicals. Several exhibitions of his photographs have been held, the last one at Jehangir Art Gallery of Mumbai. Having published two illustrated books on his travels earlier, he is in the process of finalising yet another one on his experiences with some of the large feline predators of India.