IT Infrastructure Team Leader

About the job

What being part of the Sigma Family means for you IT Infrastructure Team Leader 📍 Diep River – Office Based Lead. Innovate. Deliver Excellence. This is an exciting opportunity for an IT Infrastructure Team Leader who will be responsible for leading and developing the Infrastructure Team while ensuring the delivery of secure, resilient, and high-performing IT systems across the business. You will oversee infrastructure operations, support strategic technology initiatives, and ensure Sigma's technology environment continues to evolve in line with business and client requirements. At Sigma, we're looking for an exceptional IT leader who can combine technical expertise with people management, coaching, and operational excellence to drive business success. This is an opportunity to join an award-winning business where your leadership will directly influence infrastructure performance, business continuity, information security, and the development of future IT talent. Why Sigma? For four consecutive years, Sigma has been recognised by the Sunday Times Best Places to Work , voted for by our people. We believe in #ImproveEverythingAlways and create an environment where ambitious leaders can thrive, grow, and make a real impact. What You'll Get 📈 Career development and opportunities to apply for internal promotions following your probationary period. 🏆 Monthly, Quarterly and Annual awards with marvelous prizes. 💆♀️ Resources such as the Employee Assistance Program (EAP) and Mental Health First Aiders to support you when life might not be going quite as you expected. 🌳 Receive a tree in the Sigma Forest when you pass probation. This will allow you to review how your tree is reducing your carbon footprint. 📁 Medical Insurance – Covers doctor visits, optometrist appointments and dental assistance, funeral cover, Group Life Cover. 💖 Your Health Matters - We have a nurse on-site to assist with any female health-related queries, support when you need it most. 🤓 Your Vision, Our Mission, All Done Where You Work - We’re bringing eye care to you! From eye testing to trendy spectacles, it all happens onsite for your convenience! 🚗 Transportation Benefits – Accommodate making your traveling journey to work easier with the amazing shuttle services that we offer our employees. 💻 Join communities and collaborate with your colleagues on our internal Social Media platform. 💙 The opportunity to be a part of an equal, diverse, and inclusive workplace – all amazing people are welcome in the Sigma Family. A bit more about the Opportunity... What Your Day-to-Day Will Look Like As our IT Infrastructure Team Leader, you will lead and manage the performance, availability, security, and continuous improvement of Sigma's infrastructure estate. You will combine hands-on technical expertise with strong leadership capabilities to ensure exceptional service delivery whilst supporting the growth and development of your team. You'll - Coach, mentor and develop Infrastructure Team members through regular one-to-one meetings, performance management, workload allocation and continuous development planning. - Ensure business-critical systems remain available, secure, highly performant and appropriately documented across the organisation. - Support and administer Microsoft technologies including Microsoft 365, Exchange Online, Teams, Intune, Conditional Access, Windows Server and Remote Desktop Services environments. - Manage and develop Scale Computing and Hyper-V environments, including site-to-site replication and disaster recovery solutions. - Oversee infrastructure upgrades, patching, hardware and software installations, backup solutions and change management activities. - Monitor infrastructure capacity and performance, produce reporting metrics, and support future technology planning and investment decisions. - Work closely with the IT Infrastructure Manager, IT Security Manager and wider IT leadership team to maintain security standards, compliance requirements and operational best practice. - Drive continuous improvement initiatives, proactively identifying trends, mitigating recurring issues and implementing sustainable technical solutions. - Act as an escalation point for the IT Service Desk and support business-wide technology projects and infrastructure enhancements. What amazing People will bring to the role Who We're Looking For An IT Infrastructure Team Leader is a confident and technically capable leader who combines infrastructure expertise with exceptional people management skills. They lead by example, build strong relationships across the business and drive positive change through innovation, operational excellence and effective leadership. You will be highly skilled in systems and network administration, have a strong understanding of Microsoft technologies, and be able to balance strategic thinking with hands-on technical delivery. You will thrive in a fast-paced environment, demonstrate strong problem-solving capabilities, and possess the ability to manage multiple priorities while maintaining high service standards. You will have experience developing high-performing teams, managing stakeholder expectations, and delivering infrastructure solutions that support business growth and operational resilience. You'll Ideally Bring - Matric / Equivalent qualification (Essential). - Degree in Information Technology or a related discipline (Desirable). - Microsoft and/or Azure Certification, or equivalent commercial experience. - Previous experience leading and developing technical teams. - Strong experience with Windows Server, Windows 11 and Microsoft infrastructure technologies. - Experience administering Microsoft 365, Exchange Online, Microsoft Teams, Intune and Conditional Access policies. - Experience with Scale Computing and/or Hyper-V virtualisation platforms. - Strong systems and network administration experience. - Good IP networking knowledge, preferably within Cisco environ

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