Bartholomew Voorsanger studied architecture at Princeton University and Harvard University, completing his Master's Degree in Architecture in 1964. In the late 1960s he entered the office of I. M. Pei, working as a Design Associate. In 1978 he established the firm Voorsanger & Mills, which became Voorsanger & Associates in 1990. His international designs have included commercial, domestic, and mixed-use buildings and have won critical acclaim. He has held faculty appointments at the Rhode Island School of Design, Harvard University, Columbia University, and elsewhere. In 1985 he became a Fellow of the American Institute of Architecture.
Voorsanger's residential commissions combine the architect's interest in Eastern and Western traditions. Typical of Voorsanger's houses, the Montana House has a sculptural roof with large windowed walls that create a sense of dematerialization and actively engage the landscape. This residence was built in 1995 and sits on a 5,000 acre working ranch. The house itself was separated from the ranch center, leaving uninterrupted views of the surrounding pristine wilderness landscape. The house is extremely sculptural with two curved roofs and massive exterior stone walls.