"It has been great to get the two test days under my belt ahead of the new season," he said.
"Last year was a real challenge, but even to get three rounds was a big bonus. Compared to how green I was at this time last year, I certainly feel very prepared.
"It's great that Triple Eight has expanded to two cars. Broc Feeney is a highly-rated young driver in Supercars and to have someone next to me in the same machinery, inside the same team, is a huge bonus."
In 2021, Triple Eight has expanded its Super2 fleet, taking on Feeney in a second Commodore VF entry, giving the team double the resources and data to challenge the likes of MW Motorsport, Image Racing and Tickford Racing.
Mouzouris has continued to embed himself within the famous Triple Eight organisation too.
The former Australia Formula Ford Champion has started an apprenticeship as a fabricator and will undertake even more hands-on work away from the circuit.
However, his priority remains racing, and he's looking to make his greater chance count in 2021.
"The Super2 field looks very competitive again. There's a good mix of experience and young guys like myself, so I'm looking forward to testing myself against them," he said.
"Starting my fabricators apprenticeship is a really great way to learn more about another side of this business. This is a game of learning and earning your place, and I can't thank Roland, Jessica and the team for the opportunity to continue my progress.
"I also know that if I rip a panel off my car, I'm the one who is probably going to have to fix it!"
The opening round of the 2021 Dunlop Super2 Series will be held at the Repco Mt Panorama 500 across February 26-28. Tickets are on sale now.