Text 100's UK MD Kirsty Leighton has resigned from the agency after just four months in the role.
Leighton joined the agency from Waggener Edstrom in April, where she held the post of global head of client development, having previously held positions at Edelman and Weber Shandwick.
She leaves the global tech shop in order to spend more time with her family and officially departs the agency later this month.
Leighton said of her decision: 'After a wonderful holiday with my family, I realised that, after 18 years in the industry, it was time to focus on them.'
Dan Baxter, former UK deputy MD, has taken the helm with immediate effect. He has been with the agency for four years and has more than 12 years of experience in the industry.
Baxter said: 'The UK team has been going through a period of change over the past few months and with this change comes new and exciting opportunities.
'My plan is to use these opportunities to continue to grow the business and the team, as well as continuing to deliver strong campaigns.'
Baxter currently leads on accounts for tech brands NXP, Semiconductors, SanDisk and AMD, having previously worked on the agency's IBM, Psion and Toshiba programmes. He joined Text 100 from Intel in 2006, where he worked on UK and EMEA PR programmes.
Leighton added: 'I have thoroughly enjoyed my time with Text 100 and I am confident that Dan will lead the UK team to great things.'
Text 100's regional director northern Europe, Sarah MacKenzie, said: 'We completely respect Kirsty's decision and wish her and her family all the best. We're in great hands with Dan at the helm.'