Senior Sever Engineer

Our client operates in the financial services industry, specifically focusing on insurance is looking for a Senior Server Engineer to join their team in Johannesburg, GP.

You will be responsible for the design, implementation, and support of our enterprise server and cloud infrastructure. This role requires a self-sufficient professional who can operate independently, serve as a technical escalation point, and collaborate effectively with development teams in a regulated financial services environment where stability, security, and service availability are paramount.

Purpose of the role:

This is a hands‑on infrastructure engineering position focused on managing and improving our hybrid infrastructure across Windows Server, Active Directory, Exchange (including Hybrid), Microsoft 365, Azure, VMware, and SAN storage. The successful candidate will troubleshoot complex incidents from end to end, working across application, network, security, and infrastructure boundaries.

Responsiblities:

• Support, maintain, and troubleshoot Windows Server environments across production, UAT, development, and disaster recovery platforms

• Manage operating system configuration, patching, hardening, performance optimisation, and service availability

• Investigate server performance issues, service failures, resource constraints, and application dependencies

• Support server lifecycle activities including provisioning, upgrades, migrations, and decommissioning

• Maintain server build standards, configuration baselines, operational procedures, and support runbooks

• Participate in planned maintenance windows and provide after-hours support as required

• Act as an escalation point for complex server, platform, and infrastructure incidents

• Administer and support Active Directory Domain Services including users, groups, service accounts, and organisational units

• Manage Group Policy design, troubleshooting, maintenance, and controlled rollout

• Troubleshoot authentication, replication, DNS, Kerberos, LDAP, and domain controller health issues

• Support domain controller patching, time synchronisation, AD-integrated DNS, and recovery activities

• Support Microsoft Entra  / Azure AD Connect synchronisation and hybrid identity dependencies

• Assist with identity-related incidents affecting users, applications, servers, and scheduled tasks

• Support privileged access management, access reviews, and audit readiness

• Support and maintain Microsoft Exchange environments, including hybrid coexistence with Exchange Online

• Troubleshoot mailflow issues across internal, external, hybrid, cloud, and third‑party mail routes

• Investigate delayed, failed, rejected, quarantined, duplicated, or misrouted email

• Support connectors, accepted domains, transport rules, relay permissions, and mail routing

• Troubleshoot mailbox access, Outlook connectivity, Autodiscover, and hybrid mailbox moves

• Support shared mailboxes, resource mailboxes, distribution groups, and mailbox lifecycle operations

• Assist with Exchange certificate management, namespace configuration, and hybrid configuration health

• Collaborate with network, firewall, DNS, and security teams on mailflow dependencies

• Support email security gateway platforms (Mail Marshall or equivalent)

• Investigate blocked, quarantined, delayed, or incorrectly classified messages

• Review and troubleshoot filtering policies, allow/block lists, content rules, and anti‑spam behaviour

• Troubleshoot SPF, DKIM, DMARC alignment, DNS validation, and sender authentication issues

• Assist with DNS record validation for MX, SPF, DKIM, DMARC, and Autodiscover

• Investigate spoofing, phishing, and…