The summary section of your resume is the first opportunity, in writing, to delivery an effective “Elevator Speech”.
If you have information about a specific position you are applying for with each resume, then you can focus your Summary on those requirements of the job for which you are most qualified. This type of impactful, focused Summary will have a strong effect on the reader if your capabilities clearly fit what they are looking for.
Be strong in your quantifiable claims. Be positive in your attitude to succeed. Be ready to defend your claims.