Steven Engelhart, executive director of Adirondack Architectural Heritage, speaks to visitors at Camp Santanoni's main lodge in Newcomb in February 2012. (Enterprise photo — Peter Crowley)

KEESEVILLE — The Board of Directors of Adirondack Architectural Heritage (AARCH) has announced that Steven Engelhart will retire on Sept. 1 as the organization’s executive director after serving as its leader for almost 30 years.

AARCH’s Board of Directors has formally launched a nationwide search for a new executive director.

In making the announcement, board Chair Dean Melville said that “as Steven hands the reins to a new successor, he can look with pride at AARCH’s many accomplishments during his tenure.”

Melville noted some of those accomplishments: 1,500 members from 38 states and four nations, four full-time staff members, more than 150 educational programs conducted, a $370,000 Save America’s Treasures grant secured to help restore Camp Santanoni in Newcomb, an industrial site in Keeseville transformed into a historic site for public use, properties listed on the national historic register, technical assistance to historic property owners, advocacy for preserving architectural resources, and supporting other organizations in their preservation initiatives.

AARCH also received the National Trust for Historic Preservation’s Trustees’ Award for Organizational Excellence in 2015.

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(Correction: An earlier version of this article misspelled Mr. Engelhart’s last name. The Enterprise regrets the error.)