The problem with "this is" is that you are referring to yourself during the third man or woman. Good for introductions of another person, although not yourself. Say "I am Joe Doe" or "You've achieved Joe Doe" or perhaps just "Joe Doe". We're over complicating something that is fairly basic. https://case-study-homework-solut80722.full-design.com/5-simple-statements-about-case-study-solution-support-explained-80703461