Seidenburg completed his fourth season as head coach of the Delaware Valley University men's basketball program in 2019-20. Under his lead, the Aggies have made the MAC Freedom playoffs twice and were the top-seed heading into the postseason in 2016-17. Nine student-athletes have been named to the conference honor roll during his tenure.
In the 2019-20 season, junior Damian Washington eclipsed the 1,000 career point plateau and was later named to the all-conference team.
The 2018-19 squad finished the regular season 12-14 overall and 8-6 in league play to earn the fourth seed in the MAC Freedom playoffs, but fell at top-seed DeSales. Senior Alex Matsinye scored his 1,000th point during the season and Washington gernered all-conference accolades.
Seidenburg had a rookie season to remember in 2016-17 as he led the Aggies to a 16-10 finish, a record-tying 11 wins in Middle Atlantic Conference (MAC) Freedom play and a number one seed in the conference playoffs - all while being picked sixth in the conference coaches' preseason poll. He was named the MAC Freedom Coach of the Year for his efforts.
Three Aggies named to the all-conference team following that campaign while three earned a spot on the MAC's academic honor roll. Two more were named to the academic honor roll last season.
Seidenburg came to DelVal with seven years of Division III coaching experience, including four at fellow MAC school Messiah College (Messiah competes in the MAC Commonwealth). He was the associate head coach and junior varsity head coach with the Falcons as they went 51-28 over those four campaigns, including a memorable 19-win season in 2013-14.
In 2013-14, Messiah got off to a program-record 12-0 start and was ranked as high as 15th by D3hoops.com. The Falcons finished with a 19-5 mark in the regular season and was seeded third for the MAC Commonwealth Tournament. They dropped a four-point decision at eventual conference champion Alvernia University in the semifinals.
With Seidenburg on the staff, Messiah had five all-conference performers and a trio of 1,000-point scorers. One player – Brad Bolen - was recognized on the D3hoops.com all-region team and the National Association of Basketball Coaches (NABC) all-district team. The Falcons also performed in the classroom as the team grade point average (GPA) was above a 3.2 every semester since Seidenburg's first year. They had the highest single-semester team GPA in three of the last four semesters while Bolen was a 2014 College Sports Information Directors of America (CoSIDA) Academic All-American.
Prior to Messiah, Seidenburg was an assistant coach and recruitment coordinator for Penn State Harrisburg for the 2010-11 and 2011-12 campaigns. The Lions went 26-6 in North Eastern Athletic Conference (NEAC) play over the two years and they captured the conference title in 2011.
Seidenburg's first collegiate coaching position was at Dickinson College in 2009. In his lone year with the school, Seidenburg helped recruit the class that eventually went to the NCAA Division III Elite Eight and produced two All-Americans. He also spent time as an assistant at Northern York High School and Middletown High School.
Seidenburg was a captain as a freshman member of the Manor Junior College basketball team before playing one season with Elizabethtown College. He graduated from Elizabethtown with a bachelor's degree in history and a minor in business administration in 2006.
