Career progression requires effort - expressing a wish to advance ones' career is the bare minimum; however, you have to do all the groundwork, the homework and make all the effort that comes with it - make friends, link with people, search for contacts, browse opportunities, keep applying, find a mentor, volunteer for even the most mundane activities - you never know whom you're going to meet. Learn the Civil Service job application process and practice it, tailoring the applications to each role - and foremost: read the job ad thoroughly, this will help you avoid disappointment further down the line.