Announcing a trio of recent additions, Quad-C Management has made majority investments in professional education provider McKissock, Veterinary Specialists of North America, and consulting and placement firm Vaco. The platform acquisitions were all made in partnership with the founders and management of the respective companies. McKissock is an online provider of state and federally mandated continuing education and professional certification courses for industries ranging from real estate to health care. VSNA’s affiliated hospitals provide specialty, emergency and general veterinary care in the mid-Atlantic region. Vaco provides IT, accounting and finance professionals on a project, consulting or permanent basis.