After being admitted to the bar in New York, he practiced in Kinderhook, later practicing in partnership with Martin Van Buren. From 1797 to 1801, he was Kinderhook's Town Clerk. Van Alen was also involved in various businesses, including serving as secretary of the board of directors for the Chatham Turnpike Corporation. He was a member of the State constitutional convention of 1801, and was a
justice of the peace from 1801 to 1804. He was a member of the
New York State Assembly in 1804. Van Alen was
surrogate judge of
Columbia County from 1804 to 1808.
U.S. Congress Van Alen was elected to the
10th Congress as a
Democratic-Republican, succeeding
Henry W. Livingston and holding office from March 4, 1807, to March 3, 1809. He was an unsuccessful candidate for reelection in 1808 and
John Thompson replaced him in the House.
Later career He later returned to the surrogate judge's position, serving from 1815 until his death. He was succeeded by his half-brother, Abraham A. Van Buren. ==Personal life==