Bradbury, an Elite Development Player (EDP) who made his Edinburgh debut in a friendly against Newcastle Falcons last month, has been turning out for 'Muir for each of the last two seasons.
However, it is not just the 19-year-old back-rower who will be available for Boroughmuir this season, following Edinburgh's participation in last month's BT Premiership draft.
As part of the draft, the newly-promoted outfit were able to 'pick' Carl Bezuidenhout, Simon Berghan, Sam Beard, Neil Cochrane, Tom Brown, Stuart McInally, Nick McLennan, Andrew Turnbull, Matt Scott and Tim Visser - a formidable list of GUINNESS PRO12 talent.
They will be available when not involved in Edinburgh matchdays and Bradbury is delighted to be at the heart of a blossoming relationship between the two clubs.
"It's a really good club to be part of and the relationship between Edinburgh Rugby and the club really works," he said.
"Bryan [Easson], the EDP manager, speaks at least a couple of times a week to the coach at Boroughmuir and discusses my training at Edinburgh and how that fits in with my training at Boroughmuir.
"It's all about making sure you make the best of the opportunities available to you."
That is not where the relationship ends, however, with Easson recently invited to 'Muir's season opener as a guest speaker, talking about his EDP programme at Edinburgh.
And when Connacht came to Murrayfield last weekend Boroughmuir were in attendance, with young players from the club selling matchday programmes.
The 1st XV will directly benefit from a percentage of the night's sales, which will help to fund their next tour.
Follow us on Facebook, join the conversation on Twitter, sign up to our YouTube channel for extensive match highlights and sign up for our newsletter for regular updates on the GUINNESS PRO12
Guinness PRO12
Suite 208, Alexandra House,
The Sweepstakes
Ballsbridge, Dublin 4, Ireland