Although he started skating in the first grade, Seibert began taking formal lessons only at age 13.[2] Seen as too old for single skating, he decided to train in ice dancing.[2] He had one early partnership.
Partnership with Blumberg
Seibert met Judy Blumberg at the 1977 U.S. Championships in Hartford, Connecticut.[2] They soon tried out successfully but delayed the partnership for a year and a half until they had both relocated to Colorado Springs, Colorado.[3] In 2014, recalling the start of their partnership, Blumberg stated, "I knew this would be the boy I would skate with. You know when you move similar to someone, when your knees work with someone."[5]
Blumberg/Seibert finished fourth at the 1984 Winter Olympics in Sarajevo, Yugoslavia.[7][8] They had ranked third in the compulsory and original dances before being overtaken by Marina Klimova / Sergei Ponomarenko of the Soviet Union. The Italian judge, Cia Bordogna, scored them lower in the free dance than other judges, saying later that she considered their music unsuitable for ice dancing.[9]
Blumberg/Seibert agreed in early September 1984 to compete one more season as amateurs.[9] They were initially coached by Bobby Thompson in London and then by Claire O'Neill Dillie in Pittsburgh and New York City.[9] The two won their fifth national title, in Kansas City, Missouri, and then bronze at the 1985 World Championships in Tokyo, Japan.
Blumberg and Seibert performed in several Champions on Ice tours in the early 1980s.[8] They won the 1988 World Professional title. They parted ways in 1992.[10] Although Blumberg wanted to continue performing together, Seibert decided to end their partnership in order to pursue other interests.[11]
Seibert has also worked as an interior designer and as a real estate agent at Houlihan Lawrence.[4] His New York and California residences, both of which he designed, were featured in Elle Decor, Metropolitan Home, and Interior Design.[4]