vCO is not sold as a standalone product, it is part of vCenter. If you have purchased vCenter you are entitled to use vCO.
About Christophe Decanini:
Christophe has worked at VMware, Inc., where he started in 2007 after VMware acquired Dunes. Based in Gland, Switzerland, Christophe is a global resource supporting customers in their orchestration and automation needs. He has presented orchestration solutions at conferences such as VMworld and is the primary contributor to this site.