You are looking for a part-time job. Write a letter to an employment agency. In your letter:

Dear Sir or Madam, I am German national from Berlin and at the present I am studying for a Master degree in Mechanical Engineering with an emphasis in jet engines here, at Oxford University, where I have been for the last 6 months. In order enhance my learning, I am looking for a part-time job in the field of jet engines or aircraft manufactruing. However, if no vacancies are available at the moment for what I am looking for please note that I am open to any other job that is related to mechanical engineering and not necessarily specific to any discipline. I would be ready to start immedialty but it is preferable to be in the afternoons. I have 5 extensive years of experience in the jet engine industry which I gained post my graduation back in Berlin. Furthermore, I participated in several journals and publications in my early years at college related to the field. Moreover, I am competent engineer with advanced skills in engineering softwares. In addition, I speak English and German fluently as well as I have the bacics of French. I am looking forward to hearing from you. Yours faithfully, Dani Krus