Reported on Facebook and brothersreunited that Raldiarto Koestoer passed away on 23rd February, aged 77.

“Very much liked and respected by all those who worked in SLB Indonesia. Mr. SLB in Indonesia oil community. Trustful. Excellent advisor to SLB new managers and staff assigned to Jakarta.”

Linkedin indicate that Ral spent 33 years with Schlumberger from 1970 – 2003