The highly-rated 23-year-old centre-back was reportedly a target for a number of teams before the Chilli Boys won the race for his signature.
He has signed a two-year deal after three seasons with Simba where he made a name for himself as a powerful and reliable defender.
A Chippa statement read: "We welcome Isheanesu Mauchi to the Chilli Family. Defensive steel from Zimbabwe added to the squad."
Mauchi had been linked to a number of South African teams including TS Galaxy, AmaZulu and Durban City as well 2025 Zimbabwe Premier Soccer League title winners Scottland FC.
Golden Arrows missed an opportunity to move into the top half of the Betway Premiership on Saturday, while Siwelele beat TS Galaxy, and Orbit College drew with Richards Bay.
The league action heats up this weekend with eight teams fighting for points on different sides of the table, as some target the top eight and others avoid the drop.
We take a look at five talking points from the Betway Premiership action last week where Orlando Pirates extended their lead at the top of the table.
Chippa United moved clear of the relegation zone with a much-needed 3-0 victory over Richards Bay, as Polokwane City and Siwelele played out to a tame draw in Saturday's Betway Premiership action.
