Samsung and Hyundai accounted for around half of new hires by Korea's top 100 companies last year.
Market researcher CEO Score tallied the number of workers employed by the top 100 companies last year and found 745,098 people on their payrolls, up 2.4 percent from 2012.
Over the same period, the nation's top 100 companies saw sales rise 2.8 percent, while operating profit fell around 0.4 percentage points.
The biggest employer is Samsung Electronics with 95,794 staff, up 5.6 percent, followed by Hyundai Motor with 63,099, up 5.6 percent.
The two conglomerates accounted for 47 percent of newly hired workers in the top 100 companies last year. LG Electronics accounted for just 5.5 percent, and Hyundai Heavy Industries and Kia for 3.8 percent and 2.5 percent.