3rd Line Engineer

Our client is looking for a Senior Support Engineer to take technical ownership of assigned client accounts across Apple, Microsoft and Google environments. You will resolve complex issues, advise senior stakeholders and deliver improvement projects for a portfolio of London-based advertising, marketing and media businesses. This role combines hands-on support with proactive technical management. Responsibilities

• Own the technical relationship with assigned clients, acting as their main point of contact.
• Resolve technical issues across Apple, Microsoft and Google environments, coordinating specialist input where required.
• Deliver scheduled on-site support, including full-day client cover, alongside remote helpdesk support.
• Manage incidents through to resolution within agreed service levels, maintaining clear communication throughout.
• Review client environments, identify technology gaps and recommend practical improvements.
• Plan and deliver technical projects from initial scope through to implementation.
• Lead the technical elements of client onboarding, offboarding and infrastructure reviews.
• Maintain accurate ticket, time and technical records.
• Identify technologies and service improvements that strengthen client environments and support account growth.