RubyNation 2010: Dave worked on the 2010 web site design, plus worked with a graphic artist to develop new graphics for the site, program booklet, T-shirts and polo shirts. He also took a lead role in video production, arranging for all technical sessions to be videotaped at the conference, as well as producing a television documentary about the conference.

RubyNation 2009: For the second year in a row, the RubyNation conference has sold out. Dave worked on the 2009 web site design, worked with a graphic artist to develop new graphics for the site and conference materials, developed the Sponsorship Prospectus to solicit funds, and spearheaded the design of the give-away T-shirts and polo shirts for the conference.

RubyNation 2008: Dave was one of the founders of the RubyNation conference, a regional Ruby conference that was successfully launched in 2008. Dave served as a member of the 5-person Steering Committe for the conference, helped create the conference web site, and developed the Sponsorship Propspectus to solicit funds from potential sponsors.

Walk by Faith Rescue League: This rescue league, based in Purcelleville, VA, rescues dogs from bad situations and adopts them to good homes in the Northern Virginia area. Besides adopting a pet from them in 2008, Dave also helps out by providing handling and training services for some of the league's biggest dogs.

Hadley's Park: Hadley's Park Inc. was a local grassroots non-profit organization created in 1996 by Shelley Kramm, of Potomac, Maryland to design, develop, fund and build handicapped-accessible playgrounds. In 2000 and 2001, Dave donated the time and effort to design, build and maintain the web site for the organization. The organization built several successful playgrounds in the Maryland and Virginia areas, including the Hadley's Park Playground at the Dulles Town Center in Dulles, VA.

From 2005 to 2010, Dave volunteered his services to the Belle Terra community, serving as the Chairman of the Web Committee for his entire tenure. During this time, he implemented and maintained the community web site, functioned as the driving force and technical writer for a complete overhaul of the community's Architectural Standards, and was eventually elected to the community's Board of Directors. As a board member, he served as Vice President and, later, Acting President, where he promoted initiatives such as tree planting, a community trail system, various safety measures, and preparation for the bond release process with community developers.

Denvention 3: Dave volunteered his time and effort to assist in hosting the 66th World Science Fiction Convention in Denver, Colorado.

L.A. Con IV: Dave volunteered his time and effort to assist in hosting the 64th World Science Fiction Convention in Anaheim, CA. Besides working for the convention, Dave also found time to visit the bridge of the Starship Enterprise (NCC-1701).

Speaking Engagements: Dave has spoken on technical subjects for numerous user groups, conferences and other types of organizations:
 
— AOL Ruby Users Group
— D.C. Ruby Users Group (DCRUG)
— Independent Computer Consultants Association
— Northern Virginia Java Users Group (NovaJUG)
— Northern Virginia Ruby Users Group (NovaRUG)
— RubyNation 2008, 2009, 2010, 2011
— Scotland on Rails 2009
— Shenandoah Ruby Users Group
— SunnyConf 2010