[1] He was made Dean of Brechin Cathedral in 1350,[2] leaving this post in 1352 to become Archdeacon of Aberdeen.

The Pope nevertheless supported the decision of the chapter and appointed Alexander as bishop on 4 December 1355.

[4] He was consecrated before 12 July 1356;[2] according to Hector Boece, this took place at Perth in the presence of the king.

[5] Alexander was one of several bishop-proctors appointed for the ransom of King David in 1357, after the latter had been taken as a hostage by the English crown at the Battle of Neville's Cross eleven years earlier.

[5] Bishop Alexander died on 29 July 1380, and was buried before the altar of Aberdeen Cathedral.