Hans C. Moolenburgh was born in Haarlem in 1925 and lived there until his passing on November 6, 2018. His early life was spent with his single mother in Aerdenhout from the age of six months. From a young age, Moolenburgh had a clear vision; at six, he knew he wanted to become a doctor and was sure of God's existence, even though he hadn't been to church yet. His life was significantly marked by the events of World War II. During the harsh winter of 1944-45, known as the Hunger Winter, a tragic incident occurred involving the Gestapo which left a lasting impact on him. Moreover, his escape from a raid in December 1944 was a guiding moment in his life​.

Following his early inclinations, Moolenburgh pursued a medical career and served as a general practitioner in Haarlem from 1953 to 2007. His medical practice was not confined to conventional medicine; he had a keen interest in herbal medicine which he discovered during his mandatory military service. Over time, he explored alternative healing methods, always complementing rather than replacing traditional medical treatments. His distinctive approach led many to seek his advice. He specialized in natural treatments for cancer patients and children suffering from vaccination damage. His interest extended to dietary approaches like the Moermandiet, alternative cancer therapies, and addressing sensitivities to food additives and artificial colorings and flavorings​.

Aside from his medical career, Moolenburgh had a profound spiritual aspect that found expression in his writings. He authored books on angelic experiences, with titles like "Meetings With Angels" and "A Handbook Of Angels". In his book "A Handbook Of Angels", he attempted to rekindle the memory of angels, a topic he felt was being overshadowed by discussions surrounding the underworld. His writings on angels emerged from a sermon in Leiden in 1981, which highlighted angels as a 'forgotten group'. Moolenburgh's books on this ethereal subject aimed to evoke a broader awareness and understanding of angels among readers​.