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»» About The 451 Group: Our Team


Senior Analyst, Enterprise Software

Dennis is a member of The 451 Group's Infrastructure Computing for the Enterprise (ICE) team. He leads the firm's coverage of application and Internet performance management, service-level monitoring and management, and IT asset and service management, including desktop and project management. He also covers infrastructure software for building service-oriented architectures, encompassing Web services development, governance, integration and management tools, application development, application integration and business process management.

Dennis has a particular focus on all of these technologies in the context of cloud computing. He has authored 451 Special Reports on topics such as SOA adoption, SaaS integration, cloud performance management and PaaS. He speaks regularly at industry events focused on his diverse areas of expertise, conducts 451 and client webinars, and is regularly quoted in the trade and business press in articles about the topics and companies he covers.

Before joining The 451 Group, Dennis was a senior writer at eWeek magazine for more than five years. At eWeek he covered a number of application and productivity software beats, including CRM, business intelligence and analytics, email, IM, collaboration, enterprise search, business-to-consumer e-commerce technologies and portals. He also led eWeek's coverage of Sarbanes-Oxley Act compliance and the impact it has had on IT professionals, in addition to covering the software-as-a-service model and the IT market for small and medium-sized businesses.

Prior to joining eWeek, Dennis was Associate Editor at MC Magazine, where he covered the marketing of technology. He was also News Editor at Midrange Systems and Midrange Channels magazines, where he covered IBM AS/400 computing. In addition, Dennis has worked as a technical writer at SunGard Capital Markets, a global financial trading and risk management software firm, and as a sportswriter for a daily newspaper.

He holds a BA in Journalism from Duquesne University.

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Track this Analyst:

Performance Management Challenges in Virtual Desktop Infrastructures

eG Innovations Webinar featuring Dennis Callaghan

November 04, 2010

How to Evolve to the Cloud-Based Data Center

Zenoss Webinar featuring Dennis Callaghan

October 28, 2010

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