In order to perfect your sear, whether in a pan or on the grill, dry your meat very well. Blot is dry with plenty of paper towel. You may then choose to brush it lightly with a little high smoke point oil and season, or just lightly season the dried meat. Your pan or grill should already be hot. The meat can then be quickly seared in around 30-45 seconds per side.
The perfect sear is a skill well worth cultivating, but it takes practice.
You've made a great start though