Foreign experts accounted for less than 1 percent of research personnel at Korean companies, a report showed Tuesday, with companies identifying visa and related administrative issues as the biggest obstacles to hiring foreign workers in the field. According to the report by the Korea Industrial Technology Association (KOITA), there were 72,224 corporate research and development organizations registered with the association in 2025. Of those, only 1,945, or 2.7 percent, employed foreign researchers. The number of foreign researchers stood at 3,155, accounting for just 0.7 percent of the total research workforce. The number of research and development organizations employing foreign researchers and the number of foreign researchers increased 57.9 percent and 21.4 percent over the past decade, respectively. However, foreign researchers' share of the total research workforce remained virtually unchanged at around 0.7 percent. The report also included a survey of 1,225 companies conducted from Aug. 21 to 28 to assess their experiences with foreign researchers, hiring plans and recruitment c