LG CNS Co., Ltd. (Korean: 주식회사 엘지씨엔에스) is a South Korean technology company offering services in artificial intelligence, cloud computing and system integration.

LG CNS was founded in 1987 as System Technology Management (STM), a 50:50 joint venture between LG and Electronic Data Systems.

In 1995, the company was renamed LG-EDS System as part of LG Group's corporate identity integration project.

This sale occurred amid growing criticism of South Korea's chaebols for allegedly benefiting founding families by over-relying on outsourcing contracts and directing work to subsidiaries and affiliates.

As a result, LG CNS debuted on the market in February 2025.