Preheat your oven to 325°F (163°C).
Rub the rump roast with olive oil, salt, and pepper.
In a large roasting pan, sear the roast on all sides over medium-high heat until golden brown.
Remove the roast and add garlic, onion, carrots, and celery to the pan, cooking until softened.
Place the roast back in the pan, adding beef broth, Worcestershire sauce, rosemary, and thyme.
Cover with aluminum foil and roast in the oven for about 2.5 to 3 hours, or until the meat is tender.
Remove from the oven and let rest for 15 minutes before carving.