I did a TEFL course a long time ago, do I need to do another?
The short answer is no. However, if you gained your TEFL qualification a few years ago you may want to take a new TEFL course to refresh your training.
For example, taking a specialist TEFL course, such as Teaching Business English, will add to any previous training you have completed.
The TEFL job market is very competitive, so having specialist TEFL qualifications gives you a stronger TEFL resumé and shows professional development since the date of taking your original certification.