John Rakolta Jr.'s successor is named at builder Walbridge, transition is unclear; C-suite shakeups also at WSP, EFCG, Kleinfelder, HNTV, HS2

Exec change follows new ownership link with his Manhattan firm; buyups alter other industry C-suites

Andy Byford, a veteran of transit exec roles in London and Sydney, Australia, faces aging infrastructure and service issues as new transit agency president.