Shortly after graduating with his M.D. in 1898, Marden was employed by the
American Board of Commissioners for Foreign Missions and was sent to
Gaziantep,
Turkey to practice medicine. From there, he practiced medicine in
Gaziantep,
Adana, and
Merzifon, Turkey before he was recruited by the
American Board of Commissioners for Foreign Missions in 1905 to lead the hospital at
Anatolia College in Merzifon. Under his leadership and fundraising efforts, the hospital's capacity expanded greatly, with renovated and new buildings, electrification, and modern medical equipment.
During the Armenian Genocide In September 1915, Marden reported on the atrocities against the Armenian people to the
American Committee on Armenian Atrocities. The following year, Ottoman authorities arrested, tortured, and murdered approximately 20,000 Armenians in
Marsovan.
Anatolia College was attacked, several students and faculty members were arrested and executed, and the college closed. Dr. Marden witnessed these atrocities and left for the United States when the hospital was forcibly closed.
Leadership of Near East Relief Marden returned to
Merzifon in 1919, but was expelled again with the rest of the Americans in 1921. In 1922, he was appointed Director General of
Near East Relief for American Relief Activities in Armenia and Transcaucasian Russia after directing the fight against outbreaks of
cholera and
typhus among victims of a famine. He worked as director from 1921 until his retirement in 1941. == Personal life ==