About Us


Chairman of the Board's Message

Welcome to visit our Join Systems' homepage


Join Systems, Inc. established in August of 1990, has been growing continuously in the fields of IBS (Intellighent Building System), started in the early stage of IBS market.

All of JSI members are doing self-development with our new resolution and mind as Next Generation IBS leader under the controlling of sudden-change environment of IT industry. In addition, we put the steady investment, the development improvement of technology and welfare improvement of employee for the promotion of fringe on our chief end.

We are putting out our best strength to contribute to 21C Environment, Construction IT industry with our accumulated experience and technology by doing a creative management based on choice and concentration. Also we do our best to proceed to the credible enterprise through high-quality product and service to our client, mutual win-win strategy to cooperated company, constant profitability and growth to our investors.

Thank you


Company Fact Sheet


Corporate Name
Join Systems, Inc.
August 1990
Seoul, Korea
Corporate Status
Privately held
Chairman of the Board
Mr. Woo-Yong JEON
US$ 8.7 million (as of Dec. 31. 2021) - Won 12,260,000,000
Number of Employees
As of September 4, 2021, 19 people
Major Business
Building System Technology
  ÿ Intelligent Building Systems Consultancy Services
  ÿ Building Automation Systems
  ÿ Audio & Visual Systems
  ÿ Smart Work Network
Construction ICT
  ÿ FMS & BEMS Over BIM
  ÿ AR/VR Based FMS
  ÿ TPMS - Total Process Management System
  ÿ AC Electrostatic Precipitators for Road Tunnels
Headquarters Office
Tel : +82-2-552-2833 (Representative), Fax : +82-2-539-1102
Tel : +82-2-561-4192
Website : http://www.join.co.kr
FUJI ELECTRIC Corp. ( http://www.fujielectric.co.jp)


Company Timeline


Company is Formed in August as Join Systems, Inc. (JSI)
JSI signs an agreement on partnership with Conner
JSI launches IBS (Intelligent Building System) business
JSI establishes R&D center
JSI launches BAS business
JSI signs an agreement on partnership with American Automatrix
JSI launches Audio/Visual business
JSI signs a partnership agreement with Tyco Electronics
JSI signs an agreement on partnership with T.A.C. subsidiary of Schneider Electric
JSI signs an agreement on partnership with Hynix
JSI signs an agreement on partnership with 3M (Volition)
JSI launches BIM-based  solution business unit as a partner of JM
AC Electrostatic Precipitators FOR Road Tunnels (FUJI ELECTRIC PARTNER)
Our Organization



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