Add soy sauce, olive oil, Worcestershire sauce, brown sugar, garlic, mustard and spices into a large mixing bowl together.

Whisk the marinade until the sugar dissolves completely. This creates smooth flavor throughout the entire meat evenly.

Pat the tri tip dry using paper towels. Trim extra fat if needed before marinating the beef properly.

Place tri tip into a zip-top bag. Pour the prepared marinade over the meat completely and seal tightly.

Place the marinating tri tip inside the refrigerator. Let it soak for at least eight hours for deeper flavor.

Take the tri tip out thirty minutes before cooking. This helps the meat cook more evenly and stay juicy.

Heat the grill or skillet over medium-high heat. Brush lightly with oil to prevent sticking during cooking time.

Remove tri tip from marinade and pat lightly dry. Sprinkle salt evenly over both sides before grilling carefully.

Place the meat on the hot grill. Cook each side several minutes until a flavorful crust develops beautifully.

Lower the heat slightly and continue cooking until desired doneness. Use a thermometer for accurate internal temperature checking.

Remove cooked tri tip from heat. Let it rest for ten minutes before slicing to keep juices inside.

Slice the meat against the grain into thin pieces. Serve warm with favorite sides and extra sauce if desired.