Jackie McNamara said he could not turn down the chance to accelerate his progress to top-flight management with Dundee United, despite the difficult decision of leaving Partick Thistle.
The former Celtic and Scotland defender was unveiled by United having left Thistle in second place in the Irn-Bru First Division, five points off leaders Morton but with two games in hand.
The new Tannadice manager said: "Obviously it was a big decision to make, to leave Thistle at this time.
"But it's one that feels right. It says what I think of Dundee United to do that. The things in place here are the things that attracted me to the job.
"It's an established SPL club with a fantastic playing squad, infrastructure and youth set-up."
McNamara has signed a three-year contract.