Cameron Mitchell, or Cam is the current leader of SG-1, having been in the role since 2005 after taking over from Lt. Colonel Samantha Carter.
He was a talented United States Air Force pilot where he was given the callsign "Shaft", and led forces in the Battle of Antarctica in 2004, where he was grievously injured.
After making a full recovery, he requested to join SG-1, only to discover the other members, Carter, Teal'c and Dr. Daniel Jackson, had all left the unit to follow different paths. However, after a few months, he eventually got the team back together. For most of his time as commander of SG-1, he fought the Ori, as well as the Goa'uld, particularly Ba'al.
He was promoted to full-bird Colonel in 2008 and continues to lead SG-1 to this day with Mitchell's leadership style being similar to delta teams where everyone participates to the fullest of their abilities and defers to the specialist quickly when needed.