Mark Walker was a Peace Corps Volunteer in Guatemala and spent over forty years helping disadvantaged people in the developing world. He managed programs abroad with CARE and Plan International and, for thirty years, raised funds for organizations such as Food for the Hungry, MAP International, Global Brigades, and Make-A-Wish International. He was the CEO of Hagar USA.

His memoir, Different Latitudes: My Life in the Peace Corps and Beyond, was recognized by the Arizona Literary Association for Non-Fiction. His next book, My Saddest Pleasures: 50 Years on the Road, is part of his Yin & Yang of Travel Series. Walker is a contributing writer for “Revue Magazine,” “The Authors Show,” “The Wanderlust Journal” and the “Literary Traveler.”

Two of his 28 published essays were recognized by the “Solas Literary Award,” sponsored by “Traveler’s Tales,” including a Bronze for “Best Travel Writing—Adventure Travel.” Another essay was recently published in the ELAND Press newsletter in London.

His honors include the "Service Above Self" award from Rotary International. He’s a Board member of “Advance Guatemala” and an active member of PEN International, Phoenix Writers Club, and the Professional Writers Group.” His wife and three children were born in Guatemala.