LonMark International and its Affilate Organizations have grown to over 500 members today. Membership includes consultants, end users, integrators and manufacturers including major controls companies in the building, home, industrial, transportation, telelcommunication and utilites industires worldwide.

Sponsor Members
Sponsor members represent manufacturers, end users, equipment specifiers and system integrators. Sponsor members take a leadership role in developing the market for open, interoperable products based on LonWorks® technology and, as such make a bigger resource and financial commitment to LonMark International. All Sponsor members sit on the LonMark Board of Directors.

Constellation Energy		Distech Controls Inc.
Echelon Corporation		Honeywell International, Inc.
Johnson Controls, Inc.		Philips Lighting B.V.
QA America, LLC		Siemens Building Technologies
TAC		Trane
Yokogawa Electric Corporation

Partner Members
Partner members represent manufacturers of LonMark certified products. Partner members can participate in task groups and submit products for LonMark conformance testing. View all Partner Members.

Associate Members
Associate members represent companies and organizations that do not manufacture LonMark certified products but use, integrate, develop or distribute them. This group includes system integrators, network integrators, LonWorks Independent Developers (LIDs) and distributors. Associate members can participate in task groups but do not submit products for LonMark conformance testing. View All Associate Members.