Michael Robert Osborne is an English writer and public speaker known for his work on Christian mysticism, esotericism, and philosophical alchemy.

Osborne holds Bachelor of Arts and Master of Arts degrees in Theology from the University of Birmingham. His postgraduate work focused on the ecclesiastical structure of the Primitive and Post-Apostolic Church, and the post-Reformation polity of the Anglican Church. He has postgraduate diplomas in Education, Law, and Legal Practice from the Universities of London and De Montfort. He is an Anglo-Catholic, a member of the American Academy of Religion, and a practising Solicitor in England and Wales.

Osborne has written fifteen published works on the intersection of Western esotericism with Christian orthodoxy. He has examined the alchemical nature of William Blake's art and the theoretical connections between purported haunting and time-slip phenomena. His book 'Brazen Serpent: Chaos and Order' analysed occult concepts in the biblical Nehushtan myth and the 23 enigma.

Osborne is best known for his collaboration with Rose Circle Books in the publication of English-language editions of eighteenth-century manuscripts derived from the Order of Knight-Masons Elect Priests of the Universe. These include the 'Treatise on the Reintegration of Beings' of Martinez de Pasqually; 'The de Grainville Manuscripts' (otherwise known as the 'Manuscript of Algiers'); and the treatise of the Abbé Fournié, 'What We Have Been, What We Are, And What We Will Become'.

Masonic Grand First Principal of New York State, Piers Allfrey Vaughan, described his work as "Well-researched and well-written." Montreal-based broadcaster Jonathan Stewart of the Gnostic Wisdom Network Channel regarded the publication of Fournié's treatise into English as “... a book we've been wanting to read for more than a decade.” Canadian scholar Nicholas Lecerf of Akademi Sokak, Turkey, wrote a review of 'The Most Holy Trinosophia' in Via-Hygeia and stated, "Michael Robert Osborne in his deliberately concise but charitable introduction leads us through selected symbols & sacred figures [which] the reader meets as he unfolds the pages of the manuscript."

Osborne is a member of the Societas Rosicruciana in Anglia and a Director of Studies at Pythagoras College, Redditch, England. In 2018, he won the SRIA’s prestigious Companion of Christian Rosenkreutz Prize for his research papers on the Lessons of Lyons. He contributes to 'Watkins’ Mind, Body & Spirit Magazine' - an internationally recognised publication of various subjects from contemporary spirituality to mysticism.