Set sous vide machine to 79.5C/175F.
Lightly season the chuck roast with salt and pepper (or seasoning of your choice). Put the roast in a sous vide bag, and remove the air through a vacuum sealer or the displacement method. Drop the bag in the bath for 24 hours.
Remove bag from bath. Carefully take chuck roast out of the bag and pat dry with paper towels. Brush a thin layer of oil on the roast, and season the entire roast generously with salt and pepper.
Heat up large skillet on high and add oil. Sear roast for 1 to 2 minutes on each side, until all edges are browned. Remove from pan, and place on a plate to rest for 5 minutes. Once rested, shred the chuck roast using two forks. Use this delicious, juicy shredded beef in a bbq sandwich, tacos or anything else. Enjoy!