Mitsubishi building systems i.e. electrical equipment, air conditioning, elevator etc. were sold by Worachak Engineering Supply Co., Ltd., (WES) founded by Mr. Phaisan Sirirat-usdorn.
Established on behalf of the joint venture between Mitsubishi Electric Corporation Ltd. (Japan), Worachak Engineering Limited. under Corporate Name: Worachak International Co., Ltd. (OFFICIAL COMPANY ANNIVERSARY Dec 20, 1977) Sold mainly “Mitsubishi” elevator, escalator and air conditioning system
Installed elevators at Bangkok Bank (headquarter), the first high-rise building
Initiated turnkey package of building system e.g. air conditioning system, electrical system, plumbing & fire protection system,environmental system, PABX Telephone System, Information & Telecommunication System, Office Automation System, Computer System.
Installed the highest escalator in Thailand at Landmark Hotel
Relocated the head office from Silom Road to Bangna Towers, Bangna-Trad KM. 6.5
Installed the first spiral escalators in Thailand at Central City Bangna
Installed the highest escalators in Thailand at MRT blue line, Silom station (Public transportation category)
Initiated CSR campaign for environmental and natural resources called “One lift you need, one seed we plant” which is an afforest activity in several locations

Established the First Elevator & Escalator Training Center in Thailand
Company name change from Worachak International Co., Ltd. to Mitsubishi Elevator (Thailand) Co., Ltd. (MET)

Introduced CSR campaign, Hometown School Development to unite the employees and also return some appreciation to their schools. Later on MET partnered with Faculty of Architecture, Chulalongkorn University International Programme (INDA) for the design and construction
Installed the highest escalators in Thailand installed at Terminal-21 Asoke (shopping centre category)
Commenced a bilateral cooperation on Dual Vocational Training curriculum with many technical colleges

Initiated CSR project for children’s welfare regarding elevators and escalators safety and correct usage called “Care for Kids” also introduced company’s mascot, EQ1; a robot who ensures a safe and smooth ride for elevators and escalators
Established a new training center, Mitsubishi Elevator Training Center, the largest vertical transportation facility in Southeast Asia
Official opening of Mitsubishi Training Center and Celebrated over 12,000 units of service contract
Installed the fastest elevators in Thailand at Mahanakhon project, the tallest building in the country

Installed the highest escalators in Thailand at Terminal-21 Korat (shopping centre category)
Celebrate company’s 40th anniversary