A quality assurance manager cover letter must illustrate to the hiring company your degree of understanding and work experience in quality assurance. Provide details of your previous work experience and tasks undertaken in a comparable position also outline your academic qualifications. Briefly summarise your career goals, objectives and aspirations. Key skills that you may want to include in your cover letter are; a high degree of technical proficiency and good team player. Outline the software and databases that you have prior experience in using.