Collocations for chairman - noun

board, campaign (AmE), club, commission, committee, company, party
She is married to a company chairman.

acting, current, former, incoming, interim, new, outgoing
a report by the outgoing chairman

deputy, vice
executive, honorary, non-executive

hold the post of, serve as, take over as
appoint (sb), elect (sb), name sb
step down as
He steps down as chairman of the Federal Reserve next year.

resign, stand down
The chairman resigned following the allegations.

chairman of
chairman of the Senate Agriculture Committee