O5-1 "The Founder"

█████████ male. Appears to be in his late ████████. Believed to be ████ █████, a █████████ who attended ███████ ██████████ in the early ████s. Became involved with █████████ ████████, the individual later known as "The Administrator", shortly after the turn of the century.

Led the first research team of what would eventually become the SCP Foundation, along with O5-██, O5-██, O5-█, and several others. The events that led to him founding and assuming command of the Foundation proper are currently unknown.

Despite once being fairly active in the day-to-day running of the Foundation, O5-1 has pulled away in recent years and has not been seen in public for the last few decades, leaving O5-7 to manage the entire organization. While his death has been assumed on a number of occasions, one very high level source confirms that he continues to vote during council meetings.

While nearly every other Overseer maintains a private residence, O5-1 is believed to live at Overwatch Command. The location of this facility is unknown.