 Legally, a Professional Engineer's sign off is required for any major project to be implemented, in order to ensure the safety and standards of the project.Professional Engineering Technologists (Pr Tech Eng) and Professional Engineering Technicians (Pr Techni Eng) are other members of the engineering team.Professional Certificated Engineers (Pr Cert Eng) are people who hold one of seven Government Certificates of Competency and who have been registered by ECSA as engineering professionals.