Keywords, like career summaries, are signs of the time. Today, many employers use software to scan submitted résumés for keywords that suggest an applicant is a good match for the job. Although you won't know which exact words the software is looking for, a job posting can give you a good idea. Incorporate phrases and terms from the posting, and see what words reappear in several industry ads. Concrete terms such as "infrastructure development" and "strategic planning" will fare better than generic phrases like "hard worker" and "team player."