With the advent of global trading room platforms for the financial markets in the early 90’s, Mark prototyped early IPsec VPN over Internet as an alternative to long hours at the office or fixed ISDN lines to the home. A decade later he built a Managed Service around the leading SSLVPN that improved reliability for users and reduced the operational effort for administrators. In the last few years, he has worked with a few different vendor technologies that are now known as the secure access services edge and zero-trust network access.