Paul Barker (born February 8, 1958 in Palo Alto, California), also referred to as Hermes Pan, is the former bass guitarist, producer and engineer with the industrial metal band Ministry from 1986 to 2004. Prior to Ministry, Barker provided bass for the Seattle No Wave ensemble The Blackouts alongside future Ministry drummer Bill Rieflin and his brother, one-time Ministry touring saxophonist Roland Barker, from 1979 until 1985.

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