11. He was promoted to major in 1911 and appointed Assistant Director of Medical Services ( Army ). 12. He was co-director of medical services at Bellevue and New York University Hospitals from 1964 to 2000. 13. In 1938 he was appointed as Director of Medical Services in Nyasaland where he stayed till 1942. 14. He was appointed Principal Medical Officer at headquarters in India and Director of Medical Services in India. 15. Daniel Twum, director of medical services at a military hospital, where 53 people were treated for injuries. 16. Following his time in New Guinea, he was appointed Assistant Director of Medical Services 1st Australian Division. 17. Daniel Twum, director of medical services at the military hospital, which received most of the dead and injured. 18. From the end of 1945 to 1947, he served as Assistant Director of Medical Services at major general. 19. Mackenzie was posted to the Dr P . S . Bell as Director of Medical Services , Northern Nigeria. 20. Daniel Twum, director of medical services at the military hospital which received most of the dead and injured.
