He served the first of three terms as Mayor for 1526–27.
In 1535 he was again Mayor, been re-elected the following years.
He gained note in local folklore for firing a cannon at the castle of Mutton Island at the conclusion of a long voyage, so overjoyed was he to see his home again.
Subsequent generations of the Martyn family observed this custom.
This article about a mayor in Ireland is a stub.