Combine first 3 ingredients and rub it into both side of the roast.
Let it stand for 2-3 hours or leave it overnight in the refrigerator.
Preheat oven to 450 degrees.
Remove meat from the fridge.
Place tri tip in a roasting pan with fat side up.
Roast tri tip for at least 45 minutes or until center is medium rare.
Remove from heat.
Slice roast against the grain.
If you want it medium well roast tri tip for an hour or more.