About Us

David Longfield

Founder & Managing Director

David Longfield has been working in book publishing since 1992, giving him a depth of experience that spans the full arc of how the industry has changed — from the pre-digital era of commissioning and typesetting through to today’s integrated print, digital, and on-demand production landscape.

He began at Oxford University Press before moving to Thomson Reuters (then The Law Book Company), where he developed academic titles across the undergraduate and postgraduate law market. That grounding in rigorous editorial standards and long-form structured content has shaped everything Longueville Media has produced since.

In 2002, David founded Longueville Media with a specific focus: to bring the same editorial and production standards applied to trade and academic publishing to the custom publishing sector. In the quarter-century since, the studio has produced books for the NSW Government, the Federal Department of Foreign Affairs and Trade, the Prime Minister of Timor-Leste, Penfolds, Griffith University, and the Lowy Institute — among many others.

His role on every project is analogous to that of a director: he oversees the concept, structure, and production arc of a book from its earliest stages through to the finished object. He works directly with authors and clients in manuscript development, shapes the editorial framework, and coordinates the team of editors, designers, and production specialists who bring each title to press. Over the years he has also ghostwritten autobiographies and corporate histories — work that demands both editorial precision and the ability to find and hold a subject’s authentic voice. The result — whether a 1,500-page wine history or a single-volume commemorative — reflects that same directorial oversight.

Longueville Media has won Britain’s André Simon Award, the OIV President’s Jury Award, the Gourmand ‘Best in the World’ Award, and multiple National Trust Heritage Awards. As the studio enters its twenty-fifth year in 2027, it remains a hands-on, principal-led practice.

Siobhan Gallagher

Senior editor

Siobhan brings an unusual combination of precision and range to her editing. Her background spans science and corporate finance — disciplines that demand accuracy, rigour and the ability to follow a complex argument — and she has applied that discipline to editorial work for more almost twenty years.

She edits across Australian, UK and US conventions and has worked on publications ranging from government histories and commemorative books to expert-led non-fiction and academic research. Her attention to detail is matched by her sensitivity to voice: she improves manuscripts without erasing what is distinctive about how the author writes.