“who is the committee chair - the general staff would report to him/her”
Right now it is Republican Richard Burr, but staff responds to all members. There has been speculation that Feinstein in particular is a leaker.
Richard Burr, North Carolina, Chairman
Jim Risch, Idaho
Marco Rubio, Florida
Susan Collins, Maine
Roy Blunt, Missouri
James Lankford, Oklahoma
Tom Cotton, Arkansas
John Cornyn, Texas
Mark Warner, Virginia, Vice Chairman
Dianne Feinstein, California,
Ron Wyden, Oregon
Martin Heinrich, New Mexico
Angus King, Maine[12]
Joe Manchin, West Virginia
Kamala Harris, California
someone has to be the manager of the staff, my guess the committee chair