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DOSUG Board Members

Group Leaders
The Denver Open Source User's group is run by a number of technology leaders working entirely in a volunteer capacity. Our team endeavors to bring open source education to anyone willing to share a Tuesday night with us and our speakers. If you are interested in volunteering or speaking, email the board at

Matthew McCullough
Matthew McCullough is an energetic 13 year veteran of enterprise software development, open source education, and co-founder of Ambient Ideas, LLC, a Denver consultancy. Matthew currently is a member of the JCP, reviewer for technology publishers including O'Reilly, speaker on the No Fluff Just Stuff tour, author of the DZone Maven RefCard and Google App Engine RefCard, and President of the Denver Open Source Users Group.

His experience includes successful JEE, SOA, and Web Service implementations for real estate, finance and telecommunications firms in addition to publishing several open source libraries. Matthew jumps at opportunities to mentor and educate teams on how to leverage open source. His current topics of R&D are Cloud Computing, Maven, iPhone, Distributed Version Control (Git), and Debugging Tools.

Matthew resides in Denver with his beautiful wife and 1 year old daughter, who are active in nearly every outdoor activity Colorado offers.

Matthew can be contacted at:

Mike Barker
Mike Barker is a Java developer. He has been a consultant since moving to Colorado in 1994 and became an independent contractor and owner of On Track Consulting, Inc. in 1996. His 20+ year career as a software developer spans many industries: defense, semiconductors, medical, financial, and telecommunications. He has always been a “GUI Guy” but has been embracing more back end solutions recently. Mike is an open source enthusiast utilizing JBoss, Spring, Struts, Hibernate, Maven, Postgres, and JasperServer to name a few. In his free time he enjoys hiking and skiing.

Mike can be contacted at:

Tim Berglund
Tim Berglund runs a consulting firm called the August Technology Group, which provides training and development services to customers building web applications with open-source tools running on the JVM. He likes it best when these include Groovy and Grails.

His technology interests span web applications, business integration, data architecture, and software architecture, but his greatest passion is to help developers improve in their craft. He is a speaker internationally and at user groups in the United States, and helps lead IASA Denver and the Denver Open Source User Group. He is currently writing the book, Deploying Grails (to be published by O'Reilly), due out in 2010.

Tim can be reached at:

Dan Hillenbrand
Dan is an Open Source Developer, experienced in all areas of the system development lifecycle, including project planning, scoping, analysis, design, programming, testing, deployment, and post-implementation support. His early and mid-career focused on IBM mid-range development using 4GL (LANSA), SQL, and legacy technologies. Dan has most recently utilized Java and open-source technologies in an agile development environment.

Dan can be contacted at:

Mark Nelson
Mark is a long time contributor to the local education scene and a helpful topic reviewer and curator for the DOSUG yearly lineup of speakers.

Table of Contents

Page title Most recent update Last edited by
Future Talks July 16, 2011 8:06 PM former member
Meeting Time and Location August 2, 2011 2:03 PM former member
DOSUG Board Members March 24, 2011 12:26 PM former member
Presenting at DOSUG March 24, 2011 12:23 PM former member
Sponsors March 24, 2011 12:07 PM former member
Job Postings July 18, 2011 4:29 PM former member
About Denver Open Source Users Group March 24, 2011 12:25 PM former member

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