WARWICK, R.I. — The committee looking for a new head of T.F. Green Airport will interview four firms that want to be hired as consultants to help guide the search.The companies scheduled to be interviewed are:Spencer Stuart, an executive search firm in Boston.Boyden, an executive search firm based in Purchase, New York.Aviation Career Services, an aviation industry recruiting firm based in West Hollywood, California.The Mercer Group, a [...]