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3rd Line Engineer

Master advanced infrastructure troubleshooting and become the technical escalation expert your organisation needs

£1,300

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Course Introduction

This course trains participants to manage and troubleshoot complex issues. It includes advanced networking (VLANs, routing, SDN), disaster recovery planning, Active Directory configurations, and security patch management.

Course Objectives

At the end of this course, you will:

  • Master advanced troubleshooting techniques across infrastructure and network systems

  • Configure and support enterprise-level VLANs, routing, and

  • switching protocols

  • Plan and implement disaster recovery and business continuity strategies

  • Work with software-defined networking (SDN) and integrate with

  • Cloud environments

  • Manage Active Directory with advanced settings and automation.

  • Strengthen infrastructure security and patching procedures at scale.

Course Overview

Course Structure & Delivery

  • 4 Weeks (32 Training Hours)

  • 2 sessions per week x  2hrs 30mins

  • Experienced Infrastructure Engineers transitioning to senior roles

  • 2nd Line Engineers seeking deep technical escalation skills

  • Professionals preparing for advanced certifications

  • Weekly scenario-based quizzes

  • Final portfolio project

  • Real-world simulation

Training Modules Overview

Module 1: Advanced Troubleshooting

Learning Objectives:

Apply deep troubleshooting frameworks across complex enterprise systems and networks

Topics Covered:

  • Root cause analysis and correlation across infrastructure layers
  • Advanced diagnostic tools and comprehensive log analysis
  • Live debugging techniques for high-pressure environments
  • Structured escalation handling and documentation
  • Performance troubleshooting and capacity planning

Advanced VLAN Configuration

  • Design and implement complex VLAN architectures, including private VLANs and trunking protocols
  • Configure inter-VLAN routing with multiple routing protocols and security considerations

Protocol Analysis

  • Master Spanning Tree Protocol variants (RSTP, MSTP) and configuration 
  • Deep dive into OSPF and EIGRP for enterprise networks
  • Learn advanced protocol sniffing and traffic analysis techniques

Practical Applications

  • Simulate network segmentation for large enterprise environments
  • Troubleshoot complex VLAN issues, including black hole routing and asymmetric paths

Learning Objectives:

Implement high-availability routing and enterprise switching solutions to ensure network resilience

Topics Covered:

  • Static and dynamic routing strategies for enterprise networks
  • Layer 3 switches and core distribution/access design principles
  • Redundant link configurations and failover mechanisms
  • BGP fundamentals for larger network environments
  • Quality of Service (QoS) implementation and monitoring

DR Strategy Development

  • Create comprehensive DR playbooks and business continuity plans tailored to different business requirements.

Implementation

  • Configure real-time replication systems and site failover mechanisms for critical infrastructure.

Testing & Validation

  • Develop and execute DR testing procedures and incident response protocols.

Continuous Improvement

  • Establish metrics for recovery objectives and implement regular review processes.

You’ll design complete DR solutions that minimize downtime and protect business operations, gaining hands-on experience with industry-standard replication tools and failover technologies.

Learning Objectives:

Leverage SDN and cloud-based networking in hybrid environments to increase flexibility

and management capabilities

Topics Covered:

  • Introduction to SDN with practical examples using Cisco ACI and VMware NSX
  • Azure VNet and AWS VPC fundamentals for cloud networking
  • Hybrid cloud routing strategies and implementation
  • Cloud firewall configuration and security best practices
  • Network automation using infrastructure as code

Group Policy Management

  • Master advanced GPO configuration, troubleshooting, and inheritance management  for complex organisational structures

Domain Trust & Replication

  • Configure and manage multi-site AD replication, domain trusts, and forest configurations for enterprise environments

AD Automation

  • Develop PowerShell scripts for AD management, bulk operations, and integration with other enterprise systems

Learning Objectives:

Secure enterprise environments through layered patch and update strategies to minimize vulnerabilities

Topics Covered:

  • Enterprise patch management using WSUS, SCCM, and Intune
  • Cloud-based patching strategies with Azure Arc
  • Vulnerability scanning and comprehensive remediation plans
  • Change management processes for critical patch rollouts
  • Security testing and validation procedures

Scenario Introduction

  • You’ll receive a complex enterprise scenario with multiple interconnected technical issues affecting business operations

Investigation

  • Apply systematic troubleshooting frameworks to identify root causes across network, server, and directory services

Resolution Implementation

  • Develop and execute a prioritised resolution plan with appropriate change management

Documentation & Handover

  • Create comprehensive technical documentation and present your findings to stakeholders

The course culminates in a comprehensive troubleshooting simulation lab.

Learn With The Best

Joseph Asuquo

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Joseph Asuquo

Kayode Jaiyeola

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Kayode Jaiyeola

Ready to Elevate Your
IT Infrastructure Career?

Join our Level 7: 3rd Line Engineer course and position yourself as the technical escalation expert that organisations desperately need. Limited spaces available to ensure personalised instruction and optimal learning outcomes.

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