Worcester head coach Carl Hogg has confirmed that Namibia boss will join the struggling Premiership side on a "short-term secondment".
Davies was forwards coach at Sixways from 2010 to 2012 and was in charge of Namibia's international side at the 2015 Rugby World Cup.
According to the Worcester News, the 53-year-old will arrive at the club to offer assistance as they look to avoid relegation this season.
"Phil's come on board as a coaching consultant and we did something similar a couple of years ago with Jim McKay," said head coach Hogg.
"Phil is somebody I have known for a long time and worked with. He is somebody I trust implicitly and he gives me some support and an independent view. He's on a short-term secondment."
On their defeat to Bristol at Ashton Gate that saw the hosts close the gap on Worcester to just two points, Hogg admitted they struggled.
"We weren't very smart with ball in hand and weren't particularly threatening which is normally an asset for us," he continued.
"But you have to credit Bristol – they stuck in and were very clinical and Varndell took his tries very well."
He added: "We've had a bumpy start to the season and that’s well documented and I am actually looking forward to the second half of the season.
"I am very positive that when our influential players return then we can get moving and be a much more competitive side."