Roshan Mahanama and Sidath Wettimuny joined Sangakkara as the only former internationals on the committee while the other members are a mix of corporate, legal, and political men.
Former member of Parliament Eran Wickramaratne has been appointed as chair of the committee after resigning from all his political positions.
"I am privileged to lead a nine-member committee of individuals with impeccable integrity and expertise," Wickramaratne said.
"Our immediate priority is a total overhaul of the governance framework at SLC. The cornerstone of this effort will be the implementation of the new consitution, ensuring it serves as a robust, modern foundation for the sport."
He added: "We will focus on establishing the structures, world-class facilities, and incentive models necessary to empower our national teams.
"Our goal is to enable our players to consistently deliver world-class performances and elevate Sri Lanka back to the top tier of international rankings."
Gary Kirsten says his first task as the new Sri Lanka head coach is to find the "best balance and create consistency among the players" as he looks to tap into the rich cricket history of the country.
Ryan van Niekerk has been appointed as Sri Lanka's national bowling coach on a two-year contract, part of a significant revamp of the country's cricket coaching structure.
Pakistan missed out on qualification to the T20 World Cup semifinals despite a thrilling five-run victory against co-hosts Sri Lanka in Pallekele on Saturday.
Former Sri Lanka all-rounder Farveez Maharoof admitted it was painful to watch his side crash out of the T20 World Cup after a comprehensive 61-run defeat to New Zealand.
