If you want a little inspiration, here are two examples to talk about yourself in your resume.
“9 years of experience in the health sector including 5 years as Business developer and 4 years as Business unit manager”.
“I have mastered the intricacies of natural referencing and production techniques for print and web content for more than 10 years. I would like to put my skills at the service of your business in order to better position your articles on Google and thus improve their visibility. The managerial dimension of your offer corresponds to the orientations that I wish to give to my professional project ”.