David and Mabel Gray were pioneering missionaries to the Solomon Islands and Bougainville in the south-west Pacific.
Kenneth John and Dorothy Beatrice Gray were Adventist teachers and missionaries to Papua New Guinea and Fiji.
Joseph Green and his wife, Cleora, were missionaries to Tahiti.
Ole J. and Anna E. Grundset were among the earliest Seventh-day Adventist missionaries to evangelize Manchuria.
Cecile Francine Guiot was a missionary to New Caledonia.
Earl F. Hackman spent his early career in Home Missionary departmental leadership from local conference to General Conference levels and then moved to the presidencies of the Southeastern California Conference, the Northern California Conference, the Southern Union Conference and the Inter-American Division.
Bernard and Laura Hadfield were pioneering missionaries in the South Pacific Islands, serving in the Kingdom of Tonga and in Tahiti.
The Hainan Mission 海南区会 covered the territory of Hainan Island, off the southern coast of China, and the lower portion of the Leizhou 雷州 Peninsula, Guangdong Province. It was a sub-division of the South China Union Mission.
The Hakka Mission 客家区会 was not defined by territorial boundaries but instead by the extent of the Hakka-speaking people in the provinces of Guangdong and Fujian in the South China Mission. The first time a Seventh-day Adventist had contact with Hakka people was in 1905.
Apollos Hale was prominent in the Millerite Movement as a preacher, an organizer of camp meetings and conferences, an author of pamphlets, and an editor of the Advent Herald.
Harold James Halliday was Sanitarium Health Food administrator, war-time administrator of National Emergency and Welfare Services, secretary/treasurer of various local conferences, and president of North Queensland and Sydney Conferences.
Brian Thomas Hammond was a renowned surgeon and medical missionary from New Zealand.
Eva Perkins was an educator, editor, and administrator who served in homeland America and in South Africa alongside her first husband, Eli Miller, and her second husband, Ira Hankins.
Frances Keller Harding, M.D., was a pioneer in the field of women’s health both in Australia and the United States.
Warren Gamaliel Harding II, M.D., connected with Sydney Sanitarium and Hospital in Australia for several years prior to World War II, then returned to his hometown, Columbus, Ohio, where he practiced surgery for the remainder of his career.
Dr. Charles Harrison was superintendent of the Sydney Sanitarium and Hospital for three decades and a professor of anatomy at the College of Medical Evangelists (later Loma Linda University School of Medicine).
The Hatzfelthaven Rural Health Centre operated between 1953 and 1979. Its primary mission was to care for individuals suffering leprosy in Papua New Guinea.
Stephen G. Haughey was an evangelist and church administrator in the United States and in the British Isles, where he devoted two decades to fostering early development of the Adventist work.
Albert J. Haysmer, pioneer missionary in the Caribbean islands, also gave early leadership to the General Conference department organized to foster Adventist work among Black Americans, and served as president of three conferences in the United States and Canada.
Vaiola Kerisome, usually known as Malama among her people, was a translator and missionary briefly among the New Zealand Maoris and mainly among her people of Niue.