2 years back my bank had acquired 2 other banks an I can share the experience I had gone through at that time.
We all had the uncertainty of getting fired when the management look for synergies during PMI phase. But the management kept conversing with us during team meetings regularly about the M&A developments and how it won’t be affecting our existing job profiles, what all future opportunities would be available and value would be created through that merger, future strategy etc. They also advised us about the departments that would be impacted going forward. So such transparent and honest communication, helped to allay our fears and gave sufficient time for others to plan for their future.