Bruno has joined Graham Potter's Brighton coaching staff.
The right-back retired from playing last season after spending seven years with the Seagulls.
On Bruno's appointment, new Brighton boss Potter said: "I am aware of Bruno's influence at the club over the years, both on and off the field, and we're delighted he's agreed to stay on in this new role.
"His familiarity with the club, the city and our fans, as well as his relationship with the existing players in our squad, will be extremely beneficial to me and the rest of the coaching staff."