In separate bowl mix dry ingredients such as garlic powder, oregano, cumin, coriander, thyme and salt. Stir mixture with a fork until all the ingredients are well combined and they form a seasoning. This will be used as a rub to ensure the pork is well seasoned throughout. Sprinkle the rub over the tenderloin with a dry hand, then rub the pork with the seasoning over both sides of the meat, pressing gently so the seasoning adheres well to the tenderloin.