with Interceptor Force 2. In 2011, he premiered his first feature film as a screenwriter, a director, and an actor, entitled Re-Generator. This name is the re-titling of a film previously called One Night, on which Gruner had been working since 2010. In 2014 he featured as a director in Sector 4: Extraction, a direct-to-video release. In 2015, Gruner released one more film as a director, a producer, a screenwriter, and an actor: EP/Executive Protection. Film producing Rather early in his career, Gruner got involved in the production of some of the films in which he was appearing as an actor. This is the case for Savage (1996), Mercenary (1996), Mercenary 2: Thick & Thin (1998), Interceptor Force (1999), The Circuit (2001), and Crooked (2005). But it is only starting from the 2010's, at the exception of Interceptor Force 2 in 2002, that he accumulated his involvement both as a producer, as an actor, and as a director in One Night (2010), Re-Generator (2011), Sector 4: Extraction (2014), and EP/Executive Protection (2015). He has also been involved as a producer only in Front line (2015). And he was both an actor and a producer in Iron Cross: The road to Normandy (2018). Screenwriting Gruner has had quite a taste for screenwriting and co-writing the stories of some of the movies in which he appeared as an actor. He wrote the stories of T.N.T. (1997), Interceptor Force 2 (2002), Crooked (2005), One Night (2010), Re-Generator (2011), and EP/Executive Protection (2015). He also co-wrote the story and the screenplay of Lost Warrior: Left Behind (2008), and co-wrote the story of Sector 4: Extraction (2014). Business activities Gruner has always been involved with a number of other business activities, which also take up part of his time. He actually considers that it is wise to keep various sources of revenues generation, when one is involved in the film industry, which is very cyclical. This has allowed him to compensate for financial down times, when he was not actively involved in a movie as an actor, director, or producer. Body-guarding Gruner occasionally does body-guarding for celebrities. It can be more comfortable for some clients to have a fellow star, who understands stardom's pressure and demands, that also fulfills the role of a bodyguard. Gruner indeed not only has got one of the highest special forces military training one can receive, but also provides body-guarding