Preheat grill to medium-high heat
Trim excess fat from the tri-tip
Season generously with salt, pepper, and any preferred rub
Let the tri-tip sit at room temperature for 20 to 30 minutes
Place the tri-tip on the hot grill over direct heat
Sear each side for 4 to 6 minutes
Move the tri-tip to indirect heat
Close the lid and cook until the internal temperature reaches 130 to 135°F for medium-rare
Flip once during indirect cooking if needed for even doneness
Remove the tri-tip from the grill
Rest the meat for 10 to 15 minutes
Slice the tri-tip against the grain
Serve immediately