Tributes have been paid to tech boss Neil Muller, 54, who died after being found with stab wounds at his home.
Mr Muller was appointed group CEO of Derby-based Node4 in April 2026, having previously served as CEO of Digital Space for seven years between 2018 and 2025.
Prior to that, he was group CEO of Daisy Group from 2015 to 2018 after spending more than 20 years at Computacenter.
A spokesperson for Warwickshire Police said: “We have launched an investigation following the death of a man at a house on Langley Road in Claverdon on Sunday morning.
“We received a report from ambulance services at 6.15am about a man in his 50s who required emergency medical care following a stab wound to his chest.
“Sadly, he was declared deceased at the scene at 6.37am.
Missed: Neil Muller was group CEO of Daisy Group from 2015 to 2018
“At 7.33am, a 55-year-old woman from Birmingham was arrested on suspicion of murder. She has since been released on bail.
“An investigation is underway. There is no wider risk to the public.”
In 2021, Mr Muller was named by LDC as one of its 50 Most Ambitious Leaders.
Matthew Riley, chair of the newly formed O2 Business and founder of Daisy Group, said on LinkedIn: “I’m deeply saddened to hear of the passing of Neil Muller.
“Many of you will remember that Neil served as CEO of Daisy for almost four years and was well thought of by many colleagues across the business. My thoughts are with his family and friends at this sad time.”
John Beard, managing director Europe at Computacenter, said: “Still processing the terrible news of the sudden passing of my old boss, colleague and friend Neil Muller.
“It was a great privilege to work for Neil for so many years, simply one of the best in the industry who taught me so much.
“We are all deeply saddened to hear the news. My thoughts are with Neil’s family, friends and former colleagues who will all miss you greatly.”
Mark Riddy, VP, sales and business development at Microland, said: “Such sad and shocking news…..shared many amazing memories; a boss, a mentor, a friend and a fellow brummy. RIP Neil. You will be sadly missed my friend.”
Steve Dickens, CEO and principal analyst at HyperFRAME Research, said: “I sat next to Neil in the Birmingham office of Computacenter while I worked there and he was nothing but hardworking and focused.
“I clearly remember him one evening taking a couple of hours to show me the inner workings of the supply chain system that he was the expert in. He shared his knowledge with grace and humility.
“He was a dedicated, hardworking employee and team-mate and you knew that he would rise up the ranks and he certainly did.
“Every time our paths crossed over the years he was genuine, energetic and consistent to how he was 25 years earlier.
“Thoughts go out to his family and friends at this difficult time. The IT industry is a little less special without Neil in it.”
Filled the room with his energy
Charles Bligh, CEO of Mycom, said: “Just so shocked to hear this terrible news. Neil was a class act and he filled the room with his energy and leadership.
“My condolences to his family and his children should know their father was a respected, liked and thought leader in the business community.”
Former work colleague Juliet Morris recalled: “I first met Neil over 30 years ago at Computacenter, followed him to Daisy. Inspirational leader, friend and mentor.”
A spokesman for Node4, an AI business solutions and managed service provider, praised their former CEO’s ‘energy, momentum and passion’.