Writer of guides and stories, in roughly equal measure.

David writes two very different kinds of books. One kind explains, plainly and practically, how organisations actually change — drawn from a career spent leading technology transformation. The other kind follows a signals intelligence officer, Tom Calder, across four decades and a dozen postings most people only read about in the news.

Both come from the same instinct: pay close attention, then tell it straight.

He's also a working Toastmaster, still sanding down the edges of how a story gets told well enough that people act on it.