Prepare your sous vide and water bath. Set temp to 130 degrees F. Rub roast down with olive oil, Season your roast with salt, pepper and garlic powder and rub into the meat. Place into a vacuum seal bag or two gallon size freezer bags. Seal your vacuum sealed bag, if you are using freezer bags, place open bag into the water, push down into the water with a wooded utensil. Make sure the opening does not submerge into the water. This will get out all the air in the bag. Seal the bag and hang the edge over the side of your container. Cook for 24 hours. Drain your bag, and pat meat dry. Let meat cool for 2 hours to room temp. Heat 1 tbsp of oil in a cast iron skillet. Place meat into pan on all sides. Toss in butter, thyme, garlic and rosemary. Baste your meat on all sides with buttwr ans fresh herbs for 2 minutes. Pull and rest meat for 20 minutes. Place meat in the freezer for an additional 20 minutes. Using a deli slicer or a very sharp non serrated knife, slice beef as thin as possible. Set aside.