Can a seller include a condition requiring the buyer to keep on certain key staff after closing?

Yes, to a degree, though this usually works better as a negotiated covenant than as a strict, enforceable guarantee, since a buyer generally won't agree to give up its own management flexibility indefinitely after closing. A seller can negotiate for a post-closing covenant requiring the buyer to retain certain named employees for a defined period after closing, sometimes tied to protecting the seller's own reputation, an earn-out calculation the seller still has financial exposure to, or simply the seller's own sense of loyalty to long-serving staff.

Buyers often accept a limited version of this — a defined retention period, sometimes with carve-outs allowing termination for cause or genuine performance issues — rather than an open-ended promise never to make personnel changes. Enforcing a breach of this kind of covenant can also be tricky in practice: proving damages tied specifically to an employee's early departure is harder than proving a straightforward financial breach, so the practical value of this protection often lies as much in the relationship and reputational pressure it creates as in its strict legal enforceability.

If retaining specific staff matters to you as a seller, negotiate for it explicitly and realistically, with a Treadstone business lawyer helping frame what's actually achievable.