Being an engineer requires you to be able to design and implement systems and processes. As there are many fields of engineering you need to specify on your cover letter the field of engineering that you hold a major in. An engineering cover letter needs to display your ability to be creative and innovative and to be able to create system and process improvements that will benefit the organisation. Include in your cover letter achievements obtained from previous work experience and career highlights. Also, include a summary of your reasoning behind leaving your current employer and what interests you in the position you are applying for and how you think this position will impact your career.