Calvin Mackie
@calvinmackie
Changing Lives ... Former Engineering Professor, Author, Engineer, STEM Activist, Inventor, Speaker, Entrepreneur, Husband, Father, Friend and Mentor.
ID: 38721348
http://www.calvinmackiephd.com 08-05-2009 18:58:10
15,15K Tweet
6,6K Followers
3,3K Following
