Rescued By the Cowboy by Em Petrova

Ross Wynton, leader of WEST Protection.
He’s got a head for the tactical and an instinct for danger.
Then in walks the one person who reminds him that he’s also a man.
After a big breakthrough with her gene editing project, Doctor Pippa Hamlin is neck-deep in danger and threats. On the run, she turns to the only person she knows who can protect her—the hot cowboy crush from her gawky teen years. While she still burns for the man, she hopes he’ll help her reach Seattle for a big conference without meeting more danger.
Discovering who is threatening Pippa becomes Ross’s number one priority. So does easing that fear he sees in her beautiful hazel eyes…and fighting to keep his hands off her tallies is a close second.
Ross fears he’s too distracted and missing something, while Pippa battles to keep her wits to fight for the medical discovery she believes in. Traveling with a sexy, alpha, muscled bodyguard who brings all the heat to places a nerdy doctor ignores is hard enough without wondering if Ross will save her—or break her.