Lightly score steak and rub with salt, pepper and thyme.
In shallow glass dish, combine orange juice concentrate and oil.
Add steak; turn to coat with marinade.
Cover and refrigerate at least 30 minutes.
Drain meat; reserve marinade.
Grill steak, on covered grill, over medium-hot briquets 8 to 10 minutes on each side, turning once and basting often with marinade, until done.
Cut meat across grain into diagonal slices.