Troubled Paradise by J. M. Brister

Gray Tower, Incorporated: A private military company run by billionaire Miles Bryant. Their gray ops missions are executed by the best of the best, including ex-military, special forces, and the exceptionally talented.
Katherina Langely, Gray Tower’s IT security lead, is asked to go on a seemingly low-risk mission. She jumps at the opportunity but secretly has an ulterior motive. Jack Hunter, her biggest crush, will be going with her.
Jack Hunter was concerned when the cute IT gal tags along with him on a mission. However, his biggest problem might be keeping his hands off her. When the mission goes south, he must keep both of them safe during a twisted plot that threatens more than just their lives.