[2] He has overseen high profile legal matters as a judge including those involving the Dabhol Power Company, the Jewels of the Nizams of Hyderabad, the Claridge's hotel, encroachment disputes at Fatehpur Sikri, and legal matters relating to the Modi family.

[3] Manmohan previously represented Ambuja Cements a case involving sales tax disputes as an attorney in 2000.

[4][5] Manmohan, alongside Justice Tushar Rao Gedela, was part of a bench that dismissed an appeal on 3 July 2024, which sought the debarment of Prime Minister Narendra Modi from the Lok Sabha.

Consequently, the court directed local authorities to monitor the petitioner under the provisions of the Mental Health Act.

[6] On 14 October 2024, the Delhi High Court bench, comprising Manmohan and Gedela, criticised a Wikipedia page dedicated to the defamation lawsuit filed by Asian News International (ANI) against the Wikimedia Foundation (WMF).