Somadder was enrolled as an advocate on 21 July 1989. He practised in the High Court at Calcutta as well as the
Supreme Court of India and also appeared before
CESTAT, Eastern Regional Bench. Somadder practised in Constitutional (Customs & Central Excise, FERA, Telecommunication, Education, Service and Income Tax), Arbitration, Company, Revenue, Civil and Criminal matters, and specialised in Revenue, Arbitration and Constitutional laws. Somadder was senior counsel for the Central Government in the High Court at Calcutta and was also the honorary joint secretary of the Bar Library Club of Calcutta High Court, till just prior to his elevation. Justice Somadder was appointed the executive chairman of the State Legal Services Authority of
West Bengal on 5 November 2018. Appointed Judge-in-Charge, Administrative Department, High Court at Calcutta, to discharge the functions assigned under the Appellate Side Rules of the High Court at Calcutta, with effect from 19 November 2018. He became the Acting Chief Justice of the Calcutta High Court from 1 January 2019 and retained the post till 3 April 2019. He assumed charge as judge of the
Allahabad High Court on 17 October 2019. On 23 April 2020, he was appointed the
Chief justice of
Meghalaya High Court and took oath on 27 April 2020. He was transferred as Chief Justice of
Sikkim High Court on 9 October 2021 and took oath on 12 October 2021. He was not elevated to Supreme Court though he has been the senior most High Court judge in the
all India Seniority of all High Court judges for more than 2 years. His and
Dipankar Datta's non elevation to Supreme Court in May 2022 has generated significant controversy when much junior
J. B. Pardiwala of
Gujarat High Court was elevated to Supreme Court, had they both were elevated at this time both Somadder and Datta would be in line to become CJI in 2028. Again in March 2025, appointment of Junior judge
Joymalya Bagchi of Calcutta High Court to Supreme Court bypassing senior judges including Somadder has generated contorversy. He retired as Chief Justice of Sikkim High Court on 14 December 2025 upon reaching age of superannuation i.e. 62 years, bringing an end to 2 decades long career as Judge. ==References==