Marshall was born and raised in White Plains, NY. In his childhood he didn't really have a group of friends, without him being uncomfortable with that. He rather enjoyed the quiet. He spent his days going to school and homework. Sometimes he would go straight to his fathers work, a bank in White Plains. Through his father's work he worked up an appetite for numbers and meeting new people. During middle school his social circles exploded, but he made sure that it didn't affect his grades. He still preferred to keep to himself and not having to rely on anyone.
He met his girlfriend, Elena, an exchange student from Norway in school and when Marshall finished his finance degree, they moved in together in White Plains close to Marshall's parents. They would from time to time travel to Norway and visit Elena's family. Over time Marshall got to learn enough Norwegian so that he could lead a conversation. He started working in a Wall Street company and after a handful of years, he made senior adviser and board member. He started receiving his own assignments to go on international travels and assess low-income businesses for restructuring or acquisition.
He traveled to Chernarus to look at prospects just before the outbreak started. When public transport shut down after the outbreak, he had no way of going back home. He banded together with some of the employees at the bank he was visiting and got especially close with a guy named Ken. They kept moving around and eventually headed north into Russia and the mountains. They went from cabin to cabin, living off of scraps. Ken showed his skills as an experienced hunter and taught Marshall pretty much everything he knew. When winter came rolling in, it got too cold to stay and they went back into Chernarus and the coast. The bigger cities attracted more people as there were a bigger chance of finding food, shelter and clothes, and on the way down from the mountains they ran into a group of people who introduced themselves as The Enterprise. They were trading clothes, ammunition and backpacks for food. Luckily for Ken and Marshall, they had plenty of food and they acquired some extra ammunition for their rifles as well as proper winter clothing.
Back in Chernogorsk, Ken got attacked by an infected and they made their way to the nearest hospital to find the necessary supplies to disinfect and dress the wound. They were spotted by a huge group of infected which chased them to the roof. Ken held the door while Marshall looked for another way down. Marshall insisted that they switch places and that Ken, who was hurt, would go first. Ken disagreed. He held his ground as Marshall started his first steps down the ladder. From just below the edge he could hear the door slam open and footsteps closing in. He looked up only to see Ken for a second before an infected threw itself at him and flew off the building. They plummeted past Marshall and smashed into the ground. Marshall spent a long time recovering from this, as he felt guilty of Ken's death.
The next two years, Marshall continued the routine that he and Ken had created the first year. Living off of what people had left behind was tiresome and he started looking for a community to share his experiences and to be of use again for the first time in a long while. That is up until he ran into Sims and Jessie. They introduced him to a small community called The Grizzlies. Mainly a group of fishers, hunters and the odd ex-military, they traveled around South Zagoria building bases and outposts, making friend and enemies along the way. A few weeks into this new existence, the Grizzlies started to break apart. Luckily, through sheer circumstance, Marshall ran into Dr. Red, Benjamin and Georgia of a group called Knights of Georgia and somehow he kept running into them. Now, living as a Grizzly among Knights, he has found a new spark of hope in his life through this community...perhaps most of that spark through Georgia.