Avg . conglomerate employee has worked 10 yrs : data SEOUL , April 5 ( Yonhap ) -- The average employee at South Korea ' s 10 biggest conglomerates has worked 10 years as of last year , with Hyundai Heavy Industries Group topping the list with 15 . 7 years , government data showed Wednesday . Hyundai Kia Automotive Group came in second with 12 . 7 years , trailed by Hanwha Group with 12 years , Lotte Group 9 . 7 years , SK Group 9 . 4 years , Samsung Group 9 . 3 years , Doosan Group 9 years , LG Group 8 . 6 years and GS Group 7 . 5 years , according to the data released by the Financial Supervisory Service ( FSS ) . By company , Kia Motors Corp . was at the forefront with 20 . 3 years , followed by Hyundai Rotem at 20 . 0 years , Hyundai BNG Steel at 19 . 4 years and Hyundai Motor Co . at 17 . 5 years . The four companies belong to Hyundai Kia Automotive Group . Next came Hanwha Life at 16 . 6 years , Hyundai Mipo Dockyard at 16 years , Hyundai Heavy Industries at 15 . 4 years , Korean Air at 14 . 9 years , LG Hausys at 14 . 8 years and Doosan Heavy Industries & Construction at 14 years . Industry sources say good job security at the companies established decades ago prompted the workers to stay longer . Kia Motors Corp . was the oldest company , established in 1944 . Hanwha Life , established in 1946 , came next , followed by Korean Air and Doosan Heavy Industries & Construction both in 1962 , Hyundai BGN Steel in 1966 , Hyundai Motor Co . in 1967 , Hyundai Heavy Industries in 1973 and Hyundai Mipo Dockyard in 1975 . The average employee at Hyundai Heavy Industries worked 15 . 4 years as of last year , down from 18 . 2 years in 2011 as the company ' s payroll dropped to 23 , 077 last year from 24 , 948 five years ago amid the country ' s shipyards struggling to muddle through declining new orders . hdh @ yna . co . kr ( END )