Heat the precision cooker to 130 degrees to cook sirloin to medium-rare. Sprinkle salt and pepper on both sides of steak. Add one steak per sous vide bag with 1-2 sprigs of rosemary, thyme, or your choice of herbs
Seal the bags. Submerge them completely in the water bath, and cook for 1-2 hours. Steaks 1 ½ to 2 inches thick should cook closer to two hours
Remove steaks from the bags and pat them dry thoroughly. Sear in a preheated cast-iron skillet with a drizzle of oil for 2-3 minutes on each side. Rest for 5-10 minutes