  Many beyond the standard model extensions predict the existence of heavy
vector-like fermions. We study the LHC signatures of one such heavy vector-like
fermion, called b', with electromagnetic charge -1/3 like the SM b-quark, but
which could generically have different SU(2)_L and U(1)_Y quantum numbers. Our
emphasis will be on the phenomenology due to b <-> b' mass-mixing, present
after electroweak symmetry breaking. We focus on aspects which distinguish a
vector-like b' from a chiral b' and include tree-level decays of the b' into t
W, b Z and b h final states. While our analysis is largely model-independent,
we take as a motivating example warped-space models in which a vector-like b'
appears as the custodial partner of the top-quark.
