He was made a burgess of Dundee in 1587 for various works in the city, and in particular his renewing of the royal burgh's harbour.
[2] From 1604 to 1617 Mylne was engaged planning and executing an eleven-arched bridge across the River Tay at Perth.
[2] In 1620 he was engaged by the Laird of Scone to build a new church at Falkland, which he worked on with the assistance of his son until his death.
Mylne married Helen Kinnereis, or Kenneries, and had one recorded child, his son John.
He died in early 1621, and was buried in Greyfriars Burial Ground in Perth, where his monument, including a 1774 tablet added by his descendant Robert Mylne, still stands.