Career
In the Parliament of Scotland he was a shire commissioner for Linlithgowshire from 1704 until the Union with England in 1707. He unsuccessfully contested Linlithgowshire at the 1708 general election, and was appointed as Under-secretary of State for Scotland in 1709, serving as private secretary to Lord Queensberry. He was returned to Parliament for Buteshire at a by-election in February 1710, as a nominee of the county"s patron Lord Bute.
However, Buteshire was an alternating constituency (with Caithness) and was unrepresented in the next Parliament.
Number alternative seat was found for Mongtgomerie at the general election in September 1710. Montgomerie was a burgess of Edinburgh from 1706, and a director of the Bank of Scotland from 1706.
In 1697 he had acquired lands at Wrae in Linlithgowshire, and in 1707 he became a Commissioner of Excise for Scotland. His business failed in 1712-1713, and he was pursued by the Treasury over customs funds.
