L2/L3 Infrastructure & Core Deployments Engineer

Job Purpose

The L2/ L3 Infrastructure & Core Deployments Engineer is responsible for the deployment, configuration, hardening, monitoring, maintenance, and troubleshooting of critical infrastructure and core services. The role ensures that infrastructure environments are provisioned according to ility and reliability.

Key Responsibilities

1. Infrastructure Provisioning & Deployment

• Perform L3-level provisioning and deployment of servers, infrastructure platforms, and core services.
• Configure infrastructure according to approved architecture, technical standards, and deployment procedures.
• Complete server and security baseline hardening within the agreed deployment window.
• Maintain accurate provisioning records, deployment documentation, and configuration details.
• Coordinate with relevant teams during infrastructure deployment, migration, and implementation activities.
• Conduct post-deployment validation to ensure services are operational and meet requirements.

2. Infrastructure Health & Availability

• Monitor the health, availability, and performance of managed core infrastructure.
• Maintain critical service uptime of at least 99.5%, excluding approved maintenance activities.
• Investigate and resolve infrastructure incidents, service degradation, and recurring technical issues.
• Perform root cause analysis for major or recurring infrastructure problems and implement corrective actions.
• Proactively identify capacity, performance, and reliability risks before they impact production services.
• Ensure infrastructure monitoring and alerting are properly configured and maintained.

3. Security Baseline & Pre-UAT Readiness

• Perform pre-UAT infrastructure checks for newly provisioned environments.
• Ensure 100% of new environments pass the required hardening and security checklist before handover.
• Implement server hardening, security configurations, access controls, patching, and baseline requirements.
• Review vulnerability scan results and remediate identified infrastructure-level security issues.
• Maintain evidence of security checks, scans, configuration reviews, and compliance activities.
• Coordinate with Security, Application, and QA teams to ensure environments are ready for UAT.

4. Data Center / Hosting Operations

• Execute assigned physical and SIM/hosting-related infrastructure maintenance activities.
• Coordinate with data center, hosting, and third-party providers when required.
• Ensure maintenance activities are performed accurately and according to approved procedures.
• Prevent avoidable service interruptions through proper planning, validation, and change management.
• Maintain accurate maintenance logs, asset information, service records, and task tracking.
• Escalate infrastructure risks, unexpected issues, and service-impacting conditions promptly.

5. L3 Troubleshooting & Technical Support

• Provide advanced technical support for complex infrastructure incidents that cannot be resolved at L1/L2 levels.
• Troubleshoot operating system, server, network, storage, virtualization, and core infrastructure issues as applicable.
• Analyze logs, monitoring data, system performance, and configuration information to identify root causes.
• Support incident, problem, and change management processes.
• Provide technical guidance to L1/L2 support teams and assist in knowledge transfer.

6. Change, Documentation & Compliance

• Execute infrastructure changes in accordance with approved change management procedures.
• Prepare implementation plans, rollback procedures, validation steps, and technical documentation.
• Maintain accurate infrastructure documentation, configuration records, and operational procedures.
• Ensure all deployment and maintenance activities have appropriate logs and supporting evidence.
• Participate in infrastructure audits, security reviews, disaster recovery activities, and compliance requirements.

Key Performance Expectations

• Server and security baseline completed within agreed deployment windows.
• Critical infrastructure uptime maintained at ≥99.5%, excluding approved maintenance.
• 100% of new environments pass pre-UAT hardening and security checks before handover.
• Zero avoidable outages resulting from assigned maintenance activities.
• Accurate and complete provisioning, maintenance, and infrastructure tracking records.
• Timely resolution and escalation of critical infrastructure incidents.
• Consistent compliance with approved infrastructure, security, and change-management standards.

Required Skills & Competencies

• Strong knowledge of server and infrastructure administration.
• Experience with Windows and/or Linux server environments.
• Knowledge of server hardening and infrastructure security practices.
• Strong troubleshooting and root-cause analysis skills.
• Experience with virtualization, storage, backup, and core infrastructure technologies.
• Understanding of network fundamentals, DNS, DHCP, TCP/IP, and firewall concepts.
• Experience with infrastructure monitoring and alerting tools.
• Knowledge of ITIL-based incident, problem, and change management processes.
• Strong documentation and technical reporting skills.
• Ability to work independently and handle critical infrastructure incidents under pressure.

Qualifications & Experience

• Bachelor’s degree or equivalent qualification in Information Technology, Computer Science, Engineering, or a related field.
• Typically 2+ years of experience in infrastructure, systems administration, data center, hosting, or IT operations.
• Experience in L2/L3 infrastructure support, server deployment, security hardening, and production environments.
• Relevant certifications such as CCNA, RHCSA/RHCE, Microsoft, VMware, ITIL, or security certifications are an advantage.

Key Deliverables

• Completed and documented infrastructure provisioning.
• Server and security baseline compliance.
• Pre-UAT infrastructure readiness and security validation.
• High availability and stable operation of managed infrastructure.
• Accurate data center/hosting maintenance records.
• Timely L3 incident resolution and root-cause analysis.
• Updated infrastructure documentation and operational procedures.