Verify. Alert. Authenticate.


About TeleSign

Leadership Team

Charles McColgan

Charles McColganChief Technology Officer

Charles McColgan – security sophist, tech wonk, cerevisaphile – spearheads the technical development, operations, and long-term vision of TeleSign. He brings 20 years of industry experience, including 10 years creating and operating SaaS operations used by thousands of enterprises in the security and messaging space.

As CTO of TeleSign, McColgan leads the Engineering team, comprising IT operations and software development. Through both hiring and acquisition, he has grown Engineering to over 100 people, in the US and Serbia, who develop and operate all of TeleSign services. McColgan expanded TeleSign’s product line to support consumers directly, via its mobile app, and also to increase the functionality of its APIs around user verification, authentication, and fraud detection.

McColgan also guided the deployment of worldwide geo-redundant datacenter infrastructure, providing 99.99% availability to its customers. Ensuring that TeleSign’s products are able to protect and service 19 of the top 25 websites worldwide.

Prior to joining TeleSign, McColgan served as a software architect and then senior manager with Microsoft Corporation. Before he left Microsoft for TeleSign, McColgan was Director of Development responsible for the ForeFront security brand of server protection products, and Forefront Online Protection for Exchange service at Microsoft, which was Microsoft’s largest cloud service. McColgan joined Microsoft in August of 2005 as part of Microsoft’s acquisition of FrontBridge Technologies.

As CTO of FrontBridge, McColgan helped build the company from scratch including hiring the first engineering employees and building FrontBridge’s distributed filtering network which is still core to Microsoft’s email filtering platform today. In 2004 FrontBridge acquired MessageRite and expanded its business into the compliance email archiving space. By the time Microsoft purchased Frontbridge in 2005, FrontBridge was processing email in seven data centers worldwide for over 3000 enterprise customers.

Prior to joining FrontBridge, McColgan was Vice President of Technology at Paramount Digital Entertainment (PDE) a Viacom Company where he helped build and guide Paramount’s Internet vision from 1995 to 2000.

McColgan holds a Bachelor of Arts degree in History from UCLA.

Client Testimonials


Meet Us

TeleSign Website Menu


Use Cases




Contact Us





Client Log-in

Up to top