About Doubleknot

Doubleknot is a leading solutions provider for nonprofits and cultural attractions throughout North America. Our customers are admission- and membership-based organizations including museums, zoos, aquariums, nature centers, botanical and public gardens, science and technology centers, historic homes and sites, children’s museums,  and scout councils.

Doubleknot serves more than 300 organizations in the United States and Canada, and our year-over-year customer retention rate is greater than 95%.

We help nonprofits boost revenue and streamline operations so you can focus on what matters most: your mission.

Contact Doubleknot


(408) 741-1000

20665 Fourth Street, Suite 103
Saratoga, CA 95070


John Rees – President and Cofounder

John Rees is Doubleknot’s President and cofounder. Along with Joe Garappolo, John developed the vision for Doubleknot and oversees product development. John brings methodology and disciplines acquired in his 18 years of architecting and managing large-scale IT development projects to Doubleknot.

Prior to Doubleknot, John was responsible for sales and service delivery as a Vice President of Professional Services for the US practice of Burntsand, a publicly traded international IT consultancy. His experience traversed many industries and sectors, including non-profit organizations, government-regulated enterprises and processes, such as ethical drug development, medical device manufacturing, financial services and commercial aircraft operations and maintenance. John’s technical expertise covers the full spectrum of information technology: web, mobile computing, content management, relational databases, and enterprise application Integration, including back-end integration and the web-enablement of legacy systems.

John was a cofounder and Chief Operating Officer of Altro Solutions, an international provider of business strategy consulting, software development, and systems integration specializing in content-enhanced e-solutions. John oversaw all sales and services operations for Altro when annualized revenues were $28 million. Burntsand acquired Altro Solutions.

Prior to founding Altro, John was a Senior Manager for KPMG, where he led large consulting teams engaged in business process design and development of complex mission-critical solutions for Global 2000 clients.

An accomplished speaker, John is a sought-after presenter at educational e-business seminars. Recent industry and client speaking engagements include:

Relationship Management through Content and Personalization

Web Content Management Overview and Case Studies

Architecture for Personalization and Commerce using Documentum

Future of Wireless Applications

Content Management using Application Servers

John holds a degree in Economics from the University of Richmond in Richmond, VA.

Joseph Garappolo – Cofounder

Joseph Garappolo, a cofounder of Doubleknot, formed the company to provide leverageable technology solutions and services to membership-based nonprofit organizations.

After years of personal involvement with nonprofit organizations, including holding positions for the Boy Scouts of America, as a fundraising volunteer for community schools, and as a contributor to several community and cause-related organizations, Joe realized that these organizations could take advantage of economies of scale to implement processes and solutions that would otherwise be out of their financial reach.

Prior to Doubleknot, Joe was a Senior Vice President for the US practice of Burntsand, a publicly traded international IT consultancy. Joe was responsible for all of Burntsand’s business operations in the US.

Before joining Burntsand, Joe was CEO and co-founder of Altro Solutions, an international provider of business strategy consulting, software development, and systems integration specializing in content-enhanced e-solutions. At Altro, Joe led the company’s growth to over $28 million annually. Burntsand acquired Altro Solutions in 2000.

Prior to founding Altro, Joe was a partner with KPMG. He worked in both the New York and San Francisco offices of KPMG. He began his career after graduation working for Eastman Kodak in Rochester, New York.

Joe holds undergraduate degrees in Photograph Science and Engineering and Professional Photography, and an M.S. in Computer Science from the Rochester Institute of Technology in Rochester, NY.

David Ellis – VP, Sales & Marketing

David Ellis is a passionate advocate for nonprofit organizations who has spent his entire career helping cultural organizations operate more efficiently and effectively. At Doubleknot, David helps cultural organizations, visitor attractions and scout councils identify innovative data-based strategies to increase efficiency and effectiveness.

Prior to Doubleknot, David was the Director of Strategic Accounts for the Tessitura Network, a nonprofit software company focused on the success of arts and cultural organizations. As a result of David’s efforts, the National World War I Museum, Crystal Bridges Museum of American Art, Calgary Zoo, Canadian Museum for Human Rights and over 40 other organizations joined the Tessitura Network.

Before Tessitura, David was the Vice President of Ticketing and Customer Service for the Tennessee Performing Arts Center (TPAC). David has also worked at AudienceView and Ticketmaster in sales, support and implementation roles and regularly speaks at conferences on topics related to ticketing, visitor services and membership management.

Karen Harris Melendez – VP, Product Development and Professional Services

Karen Harris Melendez has been an executive in the nonprofit industry for more than 25 years. She was the Director of IT at The Fresh Air Fund from 1994 to 2001. In 2001, she launched KHM Business Intelligence LLC and provided a myriad of consultative services to nonprofit organizations for almost twenty years before joining Doubleknot. Karen holds a bachelor of science degree in information systems management from York College. A native New Yorker, she resides in New Jersey with her family.

Streamlined operations. Innovative technology. Exceptional support.