Combine marinade ingredients in a small bowl. Mix well and pour into a resealable bag. Add tri tip and make sure it is well coated. Using tongs, carefully turn steak over a few times in marinade. Seal bag and let steak marinate for 2-6 hours.
Preheat grill for high heat. Remove tri tip steaks from marinade and discard marinade. Place steaks on a hot grill. Cook for 12-15 minutes, turning a few times during the cooking process to get an even sear.
Remove steaks once they have reached desired doneness.
Rest steaks for 5-10 minutes. Make sure to tent with aluminum foil if the rest time is longer than 5 minutes, or you are waiting for other items to come off the grill.
Slice tri tips against the grain in to thin pieces and serve with your favorite sides.