Take the pork chops from the fridge and lightly season on both sides with salt. Set them aside.
In a medium mixing bowl, whisk ground pepper, garlic powder, onion powder, oregano, cumin, thyme, brown sugar, chili powder, and paprika. Then add the Dijon mustard, Worcestershire sauce, and soy sauce.
Thoroughly cover every inch of the pork chops with the marinade. Tightly cover with plastic wrap.
Let the pork chops marinate for at least an hour but up to 24 hours in the fridge for optimal flavor.
Fill the hopper with your desired wood pellets (select wood pellets that complement the pork's flavor, such as hickory, applewood, cherry, or a mix of these). Different pellets impart distinct smoky tastes, so experiment to find your favorite combination.
Preheat your pellet grill to around 225-250°F (107-121°C). A reliable thermometer monitors and maintains the temperature throughout the smoking process.
Fill a metal or aluminum pan with water and place it on the smoker's lower rack. You may also put it on the same rack farthest away from the pork chop. The water pan serves multiple purposes, including adding moisture to the environment and stabilizing the smoker's internal temperature.
Place the pork chop directly on the grill grates in the smoker and close the lid. Smoke for 1-1½ hours or until an instant-read meat thermometer inserted in the thickest part of the chop registers 145°F/63℃. Start checking after an hour (70 minutes worked best for me).
Remove your pork chops from the smoker and let them set for 10-15 minutes before serving.
Brush with BBQ sauce (if desired), and serve with your favorite sides.