He has edited more than 85 feature films, numerous T.V serials, corporate films and advertising films. Many of the films have been critically acclaimed nationally and internationally. Besides Hindi films, his work spans cinemas of different regions and languages including Hindi, English, French, Urdu, Oriya, Punjabi, Bhojpuri, Assamese, Chhattisgarhi and Gujarati.

He has regularly edited films for acclaimed directors like Shyam Benegal, Kundan Shah, Ketan Mehta, A.K. Bir, Pankaj Parashar, Kalpana Lajmi, Mahesh Manjrekar, Tigmanshu Dhulia, Shashant Shah, Sanjay Chhel and DR. Chandraprakash Dwivedi, to name a few. Majority of his films have won many National and International awards while a Pakistani film SAAWAN edited by him was an official entry in the Best Film in Foreign Language category at the 2018 Oscars while he recently got an award for Best Film Editing at Nice Film Festival for an English film THE ANSWER. He has also directed three documentary films which have been screened at various film festivals.

Aseem has served as a member of the Governing Council and the Academic Council of Film and Television Institute of India, Pune. He has been on the Jury of several film festivals. He is a visiting professor at FTII Pune, SRFTII Kolkata, Digital Academy Mumbai, ZIMA Mumbai, CRAFT Delhi. He has conducted many short-term courses at FTII Pune.