Mark Scout (born April 3, 1978) is a former college professor who works at Lumon Industries, first as a Senior Macrodata Refiner and then as Macrodata Refinement Chief following a promotion after his coworker Petey leaves. Mark has worked at Lumon for about two years, since just after his wife Gemma died in a car accident.

His employee number is 4502. Due to his severed status, Mark is not sure what he does at Lumon. He initially is told he is some kind of corporate historian.

He lives alone in a house in Baird Creek Manor that is subsidized by the company. His neighbor is Mrs. Selvig.

Before working at Lumon, Mark was a History Professor at Ganz College whose specialty was World War I, also known as The Great War.

Mark's wife, Gemma, was apparently killed in a car accident. Following that tragedy, Mark quit teaching and took a job on the Severed floor of Lumon to blot out his grief, if only for a portion of the day. At night when he is alone, he drinks alcohol until he passes out.

Mark has one sibling, a younger sister Devon who is married to Ricken Hale. His relationship with Devon is very close.

Over the course of the series, Mark's innie and outie both grow more distrustful of Lumon Industries, and Mark's outie even begins to think of quitting.

• According to Mark's driver's license, he was born on April 3, 1978 and his license will expire or was issued on April 4, 2020. Irving's papers reference 2009 as a past date, so this places his age at at least 30.
• Also from his driver's license: he weighs 165 lbs.

The work is mysterious and important.

Season 1, Episode 4, The You You Are (16:46)

1. Good News About Hell
2. Half Loop
3. In Perpetuity
4. The You You Are
5. The Grim Barbarity of Optics and Design
6. Hide and Seek
7. Defiant Jazz
8. What’s for Dinner?
9. The We We Are

• List of Characters