ASA Membership Growth

Perhaps instead of reaching out to heads of industry you could modify your search and reach out to ASA members who are heads (i.e. VP or higher) of industry. Do most people include a job title in their membership profile?
Also, consider, when communicating via phone or email as suggested, offering what ASA is trying to do, and ask what they would like to see ASA do (in order to earn more members, server existing members).