The Daily Mail reports that lawyer Tom Keane, from legal firm Brandsmiths, is joining the Old Trafford club in a consultancy role from next month.
The news is significant for United as they are yet to make a single signing during the summer transfer window.
Keane will play a significant role in negotiating transfers and contracts, the responsibilities held by Judge prior to his resignation.
Michael Keane came through the academy ranks at United.
Brandsmiths website reads: '"n sport, Tom has vast experience in the football industry where he has become a trusted advisor and representative for household name players, managers and pundits
"'His work for these clients includes negotiating high value transfers, contracts and endorsement agreements."