1) You don't need a professional certificate when you are employed. You have CET-4 and CET-6, so it is easier to find a good job.

2) After graduation, you can take the basic examination of registered public equipment engineer (water supply and drainage), obtain a bachelor's degree or degree that has passed the professional education evaluation, and have been engaged in public equipment professional engineering design for four years before you can take the professional examination and obtain the registration certificate.

3) Job title evaluation needs to test English and computer titles. You will understand when you work.

The above is my understanding of the design industry, and Party A and the construction unit need other colleagues to answer. .