Or coach, or trainer, depending on who you're talking to.
I have had a conversation with a flatwork instructor based in Stony Plain. She sounds like we may get along - of course you never know until you have had a couple of lessons. From 1 May onwards she will be driving PAST MY HOUSE on Wednesday evenings and could give me lessons in my arena on her way, or way back. BUT Wednesday is son's soccer night so I don't know if we'll be able to fit it in. If not, I will have to haul to one of the barns she instructs at, but that's not ideal because she tends to teach in the evening and I prefer during school hours.
She also gave me the names of two alternative instructors, one of whom she highly recommends for youngsters, and the other for flatwork.
I also have a list from the Equine Canada website of registered instructors so I have a lot to go on.