Preheat the grill to medium.
Sprinkle each seasoning onto a cutting board. Take the tri-tips and roll them over the sprinkled seasonings, making sure to coat all sides evenly.
Place the tri-tips on the grill at a 45 degree angle to establish grill marks and cook about 35 minutes, or until desired doneness. Remove the tri-tips from the grill and let the meat rest about 2 to 5 minutes before slicing. Serve with your favorite side dishes.