Enemy of my Enemy — Chris Hechtl

Newly promoted Commodore Horatio Logan had never expected to be commissioned as an officer, let alone survive to where he was now. But the Reborn Federation needed officers and engineers, needed them desperately so he'd stayed in and somehow he'd managed to thrive under the workload.
He'd seen friends come and go. He had seen his daughter off on her own command. He wasn't content in his lot in life but he wasn't a complainer either. Like Fleet Admiral Irons, he buckled down and got things done.
When the Light Cruiser Caroline returned with her payload of Bekian and Nuevo officers and delegates Horatio found himself opening up a new unexpected chapter in his life... a chapter that would forge a stronger relationship with the lost colonies with the fledgling Federation.
But Bek has it's own issues, ones no one warned them about. Navigating the sudden minefield would take a deft hand... but Horatio hadn't survived as long as he had or come as far as he had to give up or go home with his tail between his legs. He would drag the lost colonies kicking and screaming into the present even if it killed him.
… and it just might!