Evans took temporary charge of the team at the end of last season and helped keep the club in the Southern Combination League Premier Division as they finished 17th.
He guided the under-21 team to finish runners-up in the SCFL under-21 West Division last season and Mavericks chairman Steve Taylor said: "Matt has been at the club for three years. For the first two years he was first-team coach but he wanted to be a manager, so we gave him an opportunity with the under-21s last summer.
"The team had an amazing season and finished runners-up. They did superbly well and brought through a lot of players who went on to play in the first team.
"Matt took caretaker charge with Mark Currier at the end of last season when Simon Funnell decided to move on and he knows a lot of County League footballers.
"Our first aim next season will be to finish higher than this season and with a lot of youngsters at the club, we're excited about the future."
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