(written from a Production point of view)
Jack White worked as Extra Grip in the camera and electrical department of Star Trek: The Next Generation and as Best Boy Grip on Star Trek: Deep Space Nine. He received no screen credit but is listed on the call sheets. According to fellow grip Bill Witthans, White passed away. 
Other credits as electrician, gaffer, or grip electrician include the fantasy film Sword of the Valiant: The Legend of Sir Gawain and the Green Knight (1984), the drama Prick Up Your Ears (1987), the romance Vroom (1990), the comedy Fierce Creatures (1997), the fantasy film EverAfter (1998), the crime thriller Entrapment (1999), the science fiction prequel Star Wars: Episode I - The Phantom Menace (1999), the horror film Shadow of the Vampire (2000), the television thriller Bait (2002), the music drama Mrs Henderson Presents (2005), the fantasy comedy Nanny McPhee (2005), the drama Flyboys (2006), the fantasy adventure The Golden Compass (2007), the fantasy film Harry Potter and the Order of the Phoenix (2007) and its sequel Harry Potter and the Half-Blood Prince (2009), and the science fiction prequel Prometheus (2012).