  A major revision of the evaluation of $^{239}$Pu neutron-induced reaction
cross sections is reported in the fast energy range. The evaluation starts at
2.5 keV incident neutron energy and has been extended up to 30 MeV. Several
other notable changes are included in this evaluation since the release of
ENDF/B-VIII.0 including the adoption of the Standards fission cross section,
inclusion of new radiative capture data of Mosby et al., inclusion of the
(n,2n) data of Meot et al., in addition to advances in the treatment of
reaction modeling. In contrast to previous evaluation efforts, this evaluation
is reproducible with detailed information stored chronologically utilizing a
Git repository. The final evaluation results have been compiled into an
ENDF-formatted file, which has been processed successfully through NJOY,
checked for internal consistency, benchmarked versus older evaluations and
validated against a suite of critical assemblies and pulsed-spheres.
