Job Title: 3rd Line Support EngineerLocation: Office-Based - Southend-On-SeaSalary: Up to 42,000 per annumJob Type: Full-Time, Permanent About the Role: We are looking for a highly skilled and experienced 3rd Line Support Engineer to join our client''s internal IT team. This office-based role is critical in providing advanced technical support to internal colleagues and acting as an escalation point for 1st and 2nd line support teams.As the team''s technical expert, you will be responsible for diagnosing and resolving complex IT issues, mentoring 2nd line support engineers, and identifying training and development opportunities. Additionally, you will contribute to the continuous improvement of our IT support framework by developing the Knowledge Base, authoring articles that support internal staff development, and promoting a customer self-service approach.Key Responsibilities:Provide 3rd line support for escalated technical issues across systems, networks, and applications.Act as a mentor and escalation point for 1st and 2nd line support teams, fostering professional growth and knowledge sharing.Diagnose and troubleshoot complex IT issues related to networking, databases, virtualisation, and security.Maintain and optimise enterprise-level IT systems, ensuring high availability and performance.Contribute to IT service improvement initiatives, identifying opportunities for process enhancement.Develop and maintain Knowledge Base documentation for internal training and support