The Nets and Marks agreed to a four-year contract, league sources told The Vertical.
In discussions that extended to Wednesday night, the Nets significantly increased their contract offer to persuade Marks to accept the job, league sources said.
Marks, 40, had emerged as the Nets’ top choice through a two-month process.
The Spurs’ Gregg Popovich and R.C. Buford hold Marks in high regard and had been grooming him to eventually take over a more significant role in the organization.
Nevertheless, Nets ownership and top officials were enamored with the Spurs’ way, and Marks’ candidacy rose quickly in the process. Marks is a native of New Zealand who played 12 years in the NBA. He has worked as a front-office executive and an assistant coach with the Spurs since rejoining the organization in 2013.