liaise

verb3

1. •
   To establish a liaison.
2. •
   To cooperate, consult and discuss in order to come to a common solution.

   • As of May 12, Crossrail was liaising with contractors to enable physical work at stations to restart. This had been suspended on March 24 due to the COVID-19 outbreak. — 2020
3. •
   To act between parties with a view to reconciling differences.