Just convince your manager that it was their idea, and it will benefit them and save the company money to let you escape and work for the client, like how Colonel Hogan manipulated Colonel Klink on Hogan's Heros. Maybe your manager will even follow you to the client's safe house!

Klink Encourages Stalag 13's POWs to Escape - Hogan's Heroes - 1970:

https://www.youtube.com/watch?v=WMh8fjO2R50

Convinced he's on the trail of a big-prisoner escape operation, the Kommandant tries to make Stalag 13's POWs feel comfortable escaping so he and Schultz can follow them to the operation's safe house. A witty episode.