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Membership to LonMark International is open to any company, organization or individual committed to the development, manufacture, and use of interoperable open, multi-vendor control systems utilizing ISO/IEC 14908-1 and related standards.

Visit the Membership section for information on how to join LonMark International.

  LonMark Celebrates

View our organization's 20-year timeline - as featured in the January 2014 issue of LonMark Magazine.


For nearly two decades, LonMark International, a non-profit, mutual-benefit trade association, has been a driving force in setting and promoting interoperability standards in a wide variety of control applications. Millions of LonMark certified devices and tens of thousands of systems have been installed worldwide.

Join LonMark International and you can help shape the future of how open, interoperable systems are defined, specified, and used. Become part of a growing LonMark open systems community.

Why Should I Join?

  • Increase your market opportunity and become part of a networked, standards-based
    world with LonMark International branded products;
  • Forge new alliances with complementary product and service providers;
  • Build products that are certified to the LonMark International standards;
  • Make sure your requirements are heard and vendors build the products and solutions you need;
  • Demonstrate to your customers your commitment to building open systems tailored to their needs;
  • Build a network of resources and relationships with product and service providers;
  • Access to competitive bidders for the products and services you want in your systems;
  • Shape your industry’s future by helping develop and promote open standards.

Visit the Categories & Benefits section for more information.

View testimonials to see what members are saying about the value of their membership.

As a valued member, be sure to maximize your organization’s visibility with a number of member benefits and opportunities.

Learn more about LonMark International Member Benefits & Opportunities 2015/2016 click here.



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  From Our Members



LonMark has provided my company with a vehicle to generate both awareness and credibility to our customers as well as to receive knowledge and understanding about the marketplace.

– Tracy Markie, President
Engenuity Systems, Inc.

More Member Testimonials