Donagh formed Tenego Partnering in 2003 to focus on driving sales growth within technology companies. This focus draws on Donagh's expertise in defining, selling and delivering technology solutions, and builds on over 20 years of technology development, sales and business ownership, investment and management.

Over the last 21 years Donagh has developed, sold and delivered high-calibre software solutions to many well-known national and international organisations in various industry sectors and international markets. In Donagh's early career he worked with PS Squared and CompuSense developing Engineering and Desktop Publishing products and working with customers worldwide.

In 1994, Donagh established Vistech Software. Vistech sub-contracted software development services to the software industry and, over the next seven years, became one of the rising stars of Ireland's technology boom. Later he became an investor, director and CEO of Campbell Informatics which is in the business of building and selling engineering data management software into international Life Science Manufacturers.