Hiring is first screened by HR so it is helpful to include specific information about how you would be a good candidate for the job you are applying for in your cover letter, along with listing all relevant work experience on your resume, to be sure it is then forwarded on to the hiring manager. Typically a phone interview is first. Be engaging, and upbeat. Next is the in person interview. Support teams are looking for a team player, someone who isn't afraid to help out/is available to help. Often it comes down to relevant experience and how you handled yourself during the interview.