The 33-year-old has become the youngest manager in the hotseat at Albion since 1902, but already boasts seven-and-a-half years of coaching experience with Spurs.
Not only did Mason play under Mauricio Pochettino, but he has also worked under the tutelage of Jose Mourinho, Antonio Conte and Ange Postecoglou across his coaching career.
Mason also had two separate spells as caretaker manager: firstly in 2021, and again in 2023.
In his first spell, Mason became the youngest manager in Premier League history aged 29, and oversaw a 1-0 defeat against Manchester City in the EFL Cup final.
And the new Albion boss feels the experience of working under such reputable managers will help him in his quest to bring success again to the Hawthorns.
"You'd be silly not to take bits from the people I've worked with," Mason told the club.
"Not only as a player, but also as a coach, I've had exposure to some of the best managers in the world and I don't take that for granted.
"Obviously I know myself as well and my core beliefs when I was a player, but also as a coach. And then to take things from multiple coaches that I've worked under, it definitely helps me.
"But also it's something that has helped me find myself a little bit clearer, understanding what I believe in and things that I really want to implement in my team. The timing just feels absolutely right."
Mason made 70 appearances during his nine years as a player at Tottenham, scoring four goals, before going onto play a further 20 times for Hull City.
In March 2015, the former midfielder even earned a solitary cap for England as a second half substitute in their 1-1 draw against Italy in Turin.
However, a serious head injury forced Mason to retire at the age of just 25 and he revealed that a career in management has always been the focus since he hung up his boots in 2018.
"My playing career got cut very short at the age of 25, so it probably accelerated the process in terms of becoming a head coach," he continued.
"When you start coaching, you have ambitions, you have goals and you start looking to the future.
"I had a great time at Tottenham in terms of my coaching career. I got exposed to many things and finished on a really good note [winning the Europa League alongside Postecoglou].
"I've been coaching for the best part of seven-and-a-half years now and I've been exposed to quite a lot at a young age.
"But in terms of coaching experience, I feel like I've accumulated quite a lot in different circumstances as well.
"But even before the end of this season, I felt the time was coming for me to maybe branch out and look for opportunities elsewhere."