McCallum had a huge task on his hands after joining the Met as CIO two years ago: taking charge of digital transformation for a force that is notoriously slow to adopt changes.
Recently McCallum has led the rollout of cloud collaboration service Box, which is expected to save many working hours for officers on the street.
It's Friday, and the team are talking about voting, budgets and home working
Has 2020 changed how IT is viewed in business? Is collaboration now key? What about tech for good? The IT Leaders Festival 2021 will answer all of these questions and more
It's no longer viable to maintain business-as-usual - innovation and survival are closely linked
From Google to SoundCloud to the UK's biggest software company, Caoimhe Keogan is all about bringing humanity to the workplace
The Spark #2 - 'When my parents saw my bank balance I had to explain I was selling software online, it wasn't anything illict!'
Christian Owens, founder and CEO of Paddle, discusses his journey from selling website-building services door-to-door and a young teen to launching one of Europe's fastest-growing scale ups