Born and raised in Germany, Arndt received his Bachelor's Degree in Film & Television from Boston University and a Master of Fine Arts in Film Editing from the American Film Institute Conservatory. His work spans over a dozen feature films, including THE COW (Winona Ryder, Dermot Mulroney), CLEAN (Adrien Brody), SURVIVE (Sophie Turner, Corey Hawkins) and MEDEAS (Catalina Sandino Moreno).

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He is based in Los Angeles, California.