Place the soy sauce, brown sugar, garlic, ginger, cumin and chilli paste in a large, heavy snap lock bag. Smush the bag a few times with your fingers to mix all the ingredients thoroughly and dissolve the brown sugar. Place the pork chops into the marinade and seal the bag. Allow to marinate for 30 to 45 minutes.
Preheat a barbecue for medium heat and lightly oil the grate.
Remove the pork chops from the marinade and discard the marinade. Shake off excess marinade and barbecue the pork chops until browned and the meat is no longer pink in the centre, about 5 to 7 minutes per side.