I am working on this for one of my customers. RFID, BLE and NFC are different technologies. If the company has a compatible reader, then they can purchase credentials for your smart phone. HID ands Schlage are the 2 large players in the market. There are other manufacturers, and some systems are already Bluetooth (BLE) only.
Some RFID cards can be cloned, but not all. Some readers push data to the cards, which are then pushed from the card to other readers.