1) Basic Search
Google: [name] + (email or “contact me” or “contact us” )
2) Website Search
Google: site:companywebsite.com/personalblog.com + [name] + email
3) Social networks
Google: [name] + linkedin/twitter/facebook
4) Paid Services
Use 123people or linkedin (tips: a free way to message)
5) Whois
Do a whois lookup of his website or blog. There is a chance that the email is available in the domain’s admin/technical contact.