The 28-year-old key forward - fresh off helping Melbourne's mens side claim a drought-breaking premiership triumph over the Western Bulldogs in September - will assist the Dees' talls as well as support the rucks.
Demons AFLW senior coach Mick Stinear expressed his pleasure at being able to secure Brown's services amid his AFL commitments.
"Ben has been a great supporter of women's football since its inception and brings with him previous experience from his time working with North Melbourne's AFLW team," Stinear said in a club statement.
"Ben's knowledge and experience, combined with his genuine care and passion, will be a great asset for our program and we are thankful for the support of his young family allowing him to spend time with us on top of his busy AFL schedule."
In addition to the Werribee Tigers product, the AFLW Dees have also added former player Shae Sloane to its coaching staff.
Sloane, who retired from AFLW action this year, has returned to the club to take up a development coaching role.
Stinear stated his excitement by the current crop of coaches he has at his disposal and is looking forward to commencing the 2022 season.
"We're proud and excited of the coaching team we've assembled to support our players for the 2022 season," he said.
"We have a diverse group that complement each other with their varying experiences and skillsets.
"All coaches are invested in the holistic development of our players and passionate about playing their role to help this group maximise their potential as a team."
Melbourne will be looking to build on a strong 2021 season that saw them reach a preliminary final, with their new AFLW campaign set to begin in January.