Security work tends to go wrong in the same predictable ways. The scope is unclear, nobody can reproduce the findings, or the report arrives after the release it was supposed to gate. We've set up our engagements to avoid those three problems.
We don't touch anything until we have a signed authorisation and a written rules-of-engagement document. It names the in-scope assets, the test window and the escalation contacts on both sides. Systems outside the scope stay untouched.
We keep findings and evidence encrypted, share them only through a channel you nominate, and destroy them on a schedule you set.
Tell us what you've built and we'll suggest where to start.