Combine soy sauce, brown sugar, garlic, ginger, cumin and chili powder in a large plastic zipper bag or Tupperware until sugar is dissolved.
Place pork chops in the marinade and seal securely. Let marinate in the fridge for at least 4 hours.
After marinating, preheat a grill or skillet to medium-high heat. Place pork chops onto preheated grill or skillet and cook for 5-7 minutes per side until the meat is no longer pink inside (or reaches an internal temperature of 145 degrees F).