on a committee• So we will go on as long as there is a man who will acton a committee.• Being asked to go on a committee may be something we tend to shy away from at first.• In the House, for example, there were 634 persons on committee staffs in 1967.• The Democratic party's demands include equalrepresentationon committees, but they have yet to winRepublicanagreement to this.• He then servedon committees to set up a republican government and abolishkingship and the House of Lords.• Too much time is spenton committees, teams, and meetings, according to some.• Yes, he holds the least voteson committee in Security.• These different factions have debated the issues for many years on committee after committee without resolving the problems.
From Longman Business Dictionary
committeecom·mit·tee /kəˈmɪti/ noun [countableC]
a group of people within an organization such as a government, company, or political party who have been chosen or elected in order to do a particular job, take decisions etc
They will discuss the issue at a committee meeting next month,
He resigned as chairman of the committee but remains a committee member.