Horstmann began his film career in Atlanta, Georgia in the early 1990s, first as an editor and later a director at Turner Broadcasting - working on the team that launched TNT, TCM and the Cartoon Network. In 1996, he produced and directed the feature documentary The Making of Champions with NASCAR CUP team owner, Richard Childress and seven-time-champion, Dale Earnhardt. After completion of the film, Horstmann founded Triple Horse Productions, where he directed and produced hundreds of television commercials and title sequences for Coca Cola, Under Armour, Home Depot, and major sports associations; the Olympics, PGA, NBA, NHL, Major League Baseball and the NFL.

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Later, Horstmann formed Triple Horse Studios to focus his efforts on larger narrative story telling. His first feature film was the small indy Stand Your Ground distributed by eONE. Horstmann’s first television outing was a highly rated pair of History Channel prime-time specials exploring the mystery of the lost colony of Roanoke. Notable film credits include The Case for Christ, starring Mike Vogel, Erika Christensen and Faye Dunaway, and the feature documentary, that Horstmann also directed, entitled Fallen Angel: Call Sign Extortion 17 investigating the contradictions surrounding an Army helicopter in Afghanistan that was shot down carrying 17 members of the elite Navy SEAL Team 6, the unit that killed Osama Bin Laden.

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Horstmann’s 2023 scheduled film releases as Producer include Southern GospeI - a 60’s era faith drama set for theaters, Amazon Prime’s faith drama On A Wing And A Prayer with Dennis Quaid directed by Sean McNamara, and a family friendly limited series for Sony/Affirm entitled Shadrach - the six episode, coming of age tale of a little girl and her horse.

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Up next, Horstmann is in post production on Love, Courage and the Battle of Bushy Run - an action packed story of the decisive battle that ended the Seven Years War in 1763 and the southern gothic action picture, The Daylong Brothers starring Keith Carradine.

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In active development is Experiencing God - Angola, the true story of an inmate and a prison warden whose lives were intersected and irrevocably changed by the power of God sparking a miraculous reformation in the most violent prison in America, the infamous Louisiana State Penitentiary. Based on the multi-million selling interactive Bible study, Experiencing God, centered around those who have answered the call of joining God where He is working.

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Additionally, Horstmann is the founder of Cine Stables, a motion picture facility and equipment rental company. He too is the founder of Hitching Post Digital, a visual effects and post production services company.