The 35-year-old Otago manager never misses an opportunity to champion his players.
But he is not very good at mentioning his own achievements.
He sneakily bought up 50 games as manager a few weeks back.
You will remember the game. Veteran hooker Liam Coltman brought up his 100th appearance, and Otago successfully defended the Ranfurly Shield against North Harbour.
Wallace was working the sideline, doing the many and varied tasks a manager performs.
He has been in the role since 2021, but he filled in for one game for former manager Grant Hubbard in 2017.
Wallace fits it in around his other duties. He is the capability manager at the Otago Rugby Football Union, so he always wears two caps.
"I’m fortunate that work has given me the opportunity to do both," he said.
Wallace, who was King’s High School head boy and an ODT Class Act recipient in 2007, has been with the ORFU since 2014 and had a brief stint at Bayfield High School as a sports co-ordinator.
It was his dream to work in the sports industry.
"Obviously, I’ve got a desire to manage fulltime, but those opportunities don't always exist.
"I’ve probably changed as I’ve got a few more runs on the board and a bit more experience.
"I was probably always searching for those things, maybe a little bit too early rather than sort of keeping my feet on the ground and staying sort of present.
"But, yeah, that [managing full-time] would certainly be the goal.
"I’m a bit like a player, I suppose. You focus on the here and now and I have done that over the last four or five years with Otago."
This season has provided Wallace more opportunities than most to promote his players.
Otago have made their way through to the NPC semifinals.
They have played a sparkling brand of rugby that has helped lure people back through the turnstiles, and players like Dylan Pledger and Lucas Casey have captured the public’s attention.
Wallace rides the highs and lows of the team just as much as anyone else.
"I would like to say I'm a little bit calmer and measured than when I'm sitting on my couch watching. Some of our sideline officials may not always agree with that, I suppose.
"But I'm like any passionate, loyal Otago fan — I want to see the team succeed.
"I guess my role ... is to sort of be that level head throughout. So, yeah, there are times at games where I've just got to remind myself that I do need to be that steady hand.
"But I've certainly enjoyed the highs of this year."
The year has been a tough one for the Wallace family.
They lost their patriarch when Simon’s father, Murray, died in May.
Murray, a life member of the Southern Rugby Football Club, had been battling a neurological disease.
"As someone who was a very active man in his life, that was pretty challenging."
Simon’s wife, Willow, was diagnosed with breast cancer in March, but is recovering well.
"Obviously, it was a tough start to the year for our family, but ultimately a bit of a blessing.
"I know he'll be watching up there and really enjoying how this back half of the year has gone, I guess, for me personally, but for the team that he was a big fan of as well.
"We’d talk about the team at the start of the week before the team was out there. He was always keen to know who was in and who was out.
"And then, yeah, with Willow as well, that was sort of around a similar time.
"It made me appreciate the present and just keeping my feet on the ground."
The Wallaces have a 2-year-old son, Arthur, and Simon said they were thankful for the "supportive network of friends and family both inside and outside of rugby".
"There was a period there where obviously our effort and energy was sort of around Dad and just making sure he was comfortable in the rest home, and it certainly knocked him back when he heard Willow's news as well.
"But I think it was nice, in a way, that he knew she was getting the care that she needed and she was under way with that recovery when he passed."
