2008
January : Received BOI (Board of Investment) manufacturing license
March : Started manufacturing LCD (Liquid Crystal Display) TV boards
December : Achieved ISO9001 certification
2009
January : Started manufacturing Plasma TV boards
2012
January : Started manufacturing automotive boards (Car Audio)
February : Started manufacturing boards for motors
February : Started manufacturing boards for white goods appliances
March : Started manufacturing boards for air conditioners
December : Achieved ISO14001 certification
2019
September : Acquired full ownership of JOHNAN
December : Changed name to JOHNAN SIAM CORPORATION LIMITED
2022
September : Received Green Industry certification (Level 3)
2023
April : Achieved IATF16949 certification
November : Won the Bronze Award at the Thailand 5S Award 2023