Sean began making films in elementary school with a home video camera, practicing his videography and editing skills as he realized his passion for film. By high school, he was pursuing work professionally on movie sets in New York City to gain experience in the field. He enrolled at Northampton Community College to gain a formal education in video and TV production. After graduation, he launched his first production company, [K] Studios, with a business partner and served corporate clients for over 15 years including The Martin Guitar Company, MTV Books, Empire Beauty School, Bravo Network, Service Electric/Blue Ridge Cable TV, Majestic Athletic, The MLB Network, The Collegiate Empowerment Company, Warner Bros. Home Video, and The Weller Health Education Center. The Eastern Pennsylvania Business Journal named Tiedeman in the top 20 of the region's business leaders under the age of 40.

 

Sean directed his first horror-comedy Hell's Half Acre in 2006. The film launched to rave reviews, including coverage in Fangoria magazine and has quickly developed a large cult following. Synergy magazine in Australia praised "Hell’s Half Acre ends up packing quite a punch in both the horror and dark humor departments and stands out from many other indie productions." And in 2015 HorrorNews.net stated “Hell's Half Acre delivers over and over again. This is one of those hidden gems that I love finding in this job...”