Pat the tri-tip dry
Trim excess fat if needed
Season generously with salt and pepper
Add garlic powder, onion powder, and paprika if desired
Let it sit at room temperature for 30 to 45 minutes
Preheat oven to 425°F or grill to medium-high heat
Sear the tri-tip on all sides until browned
Move to indirect heat or place in the oven
Cook until internal temperature reaches 130°F for medium-rare or 140°F for medium
Remove from heat and rest for 10 to 15 minutes
Slice thinly against the grain
Serve immediately