After completing his Bachelor of Arts at Princeton University, Peter Briger would begin working for Goldman Sachs. At the time he was not sure how far his career in finance would take him, but he was determined to make the best out of it. He began ascending the ranks in the bank, and by 1996 he was made partner. This meant that Briger was doing something right at Goldman and he would continue to ascend through the various levels as the years went by. During this time a lot was happening, and the need for private equity firms was rising. Seizing the opportunity three investors who all had a background in finance came together and began Fortress Investment Group.
This group was founded in 1998 and at the time it had about four hundred million in assets under its direct management. Over the next five years, Fortress Investment Group would experience exponential growth, managing to bring its total assets under management to about 3 billion dollars. This was a turning point for the group as they quickly realized that there was a need to bring in more talent and experienced managers who would take Fortress to the next level. At this point, Peter Briger was brought in, and he joined the management team. His work at fortress would become immediately noticeable, and by 2006 he had joined the board of directors.
This would mark a turning in his career. The following year, Fortress made a decision to list on the NYSE to be able to raise more capital while at the same time give more investors the opportunity to experience the Return on Investment the private investors were experiencing. Peter Briger would face one of his toughest tests at fortress during this time as he was tasked with overseeing the same even as his former employer Goldman Sachs provided liquidity for the same. The listing went on smoothly and the value of Fortress Investment Group or FIG as it was now listed skyrocketed. Following the success of this event, Peter Briger would be made Co-chairman of the group a move that saw him consolidate his role within the organization.