Mr Thomas has joined the Building Blocks board as strategy and design director. He will move to Manchester from the old Ucensis base in Ellesmere Port.
He said: "The creative design and strategic planning expertise we have developed at Ucensis dovetail perfectly with Building Blocks' existing in-house capabilities, and integrating the businesses will allow us to cater more effectively for clients looking for end-to-end solutions."
Building Blocks was started in the same year as Ucensis by Jonathan Whiteside and Andy Iddon.
Today it turns over more than £2.3m and has offices in Manchester and New York. The acquisition takes staff numbers to 40 and Building Blocks is expanding its Manchester HQ to cope with the growth.
Building Blocks has worked with organisations including airline Alitalia, cruise line Royal Caribbean International and African mobile telecoms firm Vodacom.
Building Blocks director Jonathan Whiteside said: "We have worked closely with Ucensis as a supplier since we launched the business, harnessing the team's skills in consulting with clients in the design and creative execution of solutions.
"This has become a core service of the business as we have begun working with clients at a strategic level and the acquisition cements the necessary skill sets within the business, preparing the way for further growth.
"Demand continues to be strong for all of our services and one particular area in which we are seeing significant growth is international rollouts of websites as businesses increasingly find it a necessity to enter growing markets in territories such as China and the Middle East.
"We allow our clients to achieve this while driving efficiencies by reducing the amount of effort required to manage an estate of websites around the globe.
"Our experience of designing global rollout strategies and track record of delivering these complex projects present a lot of opportunities for us to expand the business and we are aiming to double revenues over the next two years."