Black Diamond Carpentry was founded in 1990 by Ed Buckingham. In 1992, Ryan Sullivan graduated Lowell Vocational High School and started full time with BDC. He studied for and successfully passed the Construction Supervisor Licensing exam while a Journeyman Carpenter in 1998. In 2002, Ryan Sullivan took over the business and changed the name to Black Diamond Carpentry & General Contracting. Ryan is now considered to be a Master Carpenter, as well as a Master Builder.