2. "I work for THE Quality Assurance Team..."
3. If I might make a comment about context, I initially read ISO in the sentence as meaning International Standards Organization (as in ISO 9000 Certificate), but it presumably means International Shipping Organization, given the context of the second phrase. You should spell out acronyms unless you know your audience will understand them.
"My main job is the production of documents necessary for acquiring the ISO certificate, or that of another international shipping organization, such as the DNV, LR, or BV."
4. Do not start sentences with a conjunction like 'and'.
"I am also in charge of progressing projects that will improve the quality of the product."
The Saxon genitive here is not wrong, but it sounds less formal to my ear. I would not use it this way in a business context, but others may disagree.
Student or Learner