In 1975, the company began producing diesel engines with financial support from the German government and technical collaboration with MAN SE.

In March 2007, the company acquired Yantai Yuhua Machinery, a wheel loader maker, for 22 million yuan.

[10] Doosan recorded South Korea's largest international acquisition by purchasing Bobcat and other construction equipment units from Ingersoll Rand for $4.9 billion in November 2007.

[13] Alike Daewoo in 1997, Doosan Group also faced a liquidity crisis due to years of declining orders amid an economic slowdown.

In 2021, Hyundai Heavy Industries Group purchased a 35 percent stake in Doosan Infracore for 850 billion won.