Key engineer developing and operating Web Application Firewall (WAF) platforms at Lloyds Banking Group. Enhancing security and performance while working with modern engineering practices.
About the role
- Lead Infrastructure Engineer overseeing cloud-first enterprise IT infrastructure at Medical Guardian. Responsible for design, maintenance, and performance of Azure cloud infrastructure and security response.
Responsibilities
- Own and manage Azure-based infrastructure including compute, networking, DNS, VPNs, virtual appliances, private endpoints, and storage accounts.
- Administer and optimize Microsoft 365 services including Exchange Online, SharePoint Online, OneDrive, Teams, and Entra ID (Azure AD).
- Implement and support Intune Endpoint Manager, Conditional Access, and other identity governance and device compliance tools.
- Act as Tier 3 escalation for infrastructure and network issues, both during and outside business hours—including security events requiring immediate response.
- Support and monitor Proofpoint Email Security, working closely with the Security & Compliance team to investigate threats and mitigate phishing attempts.
- Perform log analysis across platforms such as Azure Monitor, Sentinel, Defender, and Proofpoint to assist in incident triage and root cause investigations.
- Manage on-site network infrastructure, including switch and firewall configuration (Cisco), VLANs, wireless, and site connectivity.
- Troubleshoot complex network issues at the packet level using tools like Wireshark and perform physical diagnostics and hardware replacements as needed.
- Assist in the administration of Linux-based VMs (RHEL) and cloud workloads in Azure and AWS environments.
- Lead infrastructure automation and scripting efforts using PowerShell Bicep and Bash to improve operational efficiency and reduce manual overhead.
- Contribute to post-incident reviews and work with security teams on continuous improvement of system hardening and defense-in-depth.
- Partner with Help Desk, Security, and Engineering teams to deliver reliable, secure IT services and infrastructure.
- Maintain documentation of infrastructure configuration, network diagrams, and operational runbooks.
- Participate in on-call rotation for high-impact or after-hours infrastructure and security events.
Requirements
- Bachelor’s degree in Computer Science, Information Technology, or related field
- Minimum of 8+ years in IT infrastructure roles, with 3+ years in a senior or lead position
- Deep expertise with Microsoft Azure (IaaS/PaaS networking, compute, NSG, Private DNS, VPN Gateway, etc.)
- Strong working knowledge of Microsoft 365 (Exchange, SharePoint, Teams, OneDrive, Entra ID)
- Skilled in managing Conditional Access, SSO integrations, Intune/Endpoint Manager
- Experience with PowerShell scripting for automation and policy enforcement
- Proficient with TCP/IP, DNS, DHCP, VLANs, and firewall configurations
- Hands-on experience with Cisco Meraki network gear
- Experience with Proofpoint, Netskope, or other email/security platforms is a plus
- Admin-level knowledge of Linux servers (basic patching, log review, networking)
- Ability to write and troubleshoot Bash and PowerShell scripts
- Familiarity with Git and Infrastructure-as-Code concepts is a plus
Benefits
- Health Care Plan (Medical, Dental & Vision)
- Paid Time Off (Vacation, Sick Time Off & Holidays)
- Company Paid Short Term Disability and Life Insurance
- Retirement Plan (401k) with Company Match
Job title
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