Many large international corporations and companies rely on TOEIC to assess the business English of their employees. It is also one of the few English certificates whose results can be classified in the Common European Framework of Reference (CEFR).
The main difference to the TOEFL certificate is that the latter qualifies more for the academic field, whereas the TOEIC certificate specifically proves work-related English. Passing the TOEIC will significantly increase your chances on the job market. iQ in Berlin offers comprehensive TOEIC preparation.