Looking For A Pet Sitter For 1 Cat In Midlothian

I found my cat momo on the street he had jumped in my car near my moms house so this cat is special to me. He just refuses to get along with my moms cats. When I first got him I was living alone in a 1 bedroom apartment. Since I have moved back in with my mother and he wont get along with the other cats. He going straight to attacking them (Fur flying). Im at a loss and I dont know what to do I feel bad keeping my cat trapped and I love him to much to give away. If someone is able to help me with knowledge and training to better suit the needs of my cat so he stops being so mean.