Level 3 Infrastructure Engineer (Cloud, Storage & Networking)

Location: Onsite, Allen, TX

Employment Type: Full-Time

About the Opportunity

Our client is seeking a highly skilled Level 3 Infrastructure Engineer who thrives in complex enterprise environments. This is not a traditional cloud-only engineering role. The ideal candidate brings deep expertise across cloud infrastructure, enterprise storage, virtualization, and advanced networking, serving as the technical escalation point for critical infrastructure and project initiatives.

You'll design, implement, optimize, and support highly available environments while partnering with internal teams and clients to solve challenging technical problems.

Position Summary

As a Level 3 Infrastructure Engineer, you'll be responsible for architecting and supporting enterprise infrastructure across cloud platforms, storage systems, virtualization, networking, and backup technologies. You'll lead complex migrations, troubleshoot high-impact issues, mentor junior engineers, and contribute to long-term infrastructure strategy.

This role is ideal for someone who enjoys solving complex technical challenges while maintaining a strong customer-service mindset.

Key Responsibilities

Infrastructure Engineering

• Design, deploy, and maintain enterprise infrastructure solutions
• Lead complex server, storage, virtualization, and cloud projects
• Serve as the highest level of technical escalation for infrastructure-related issues
• Perform root cause analysis for critical outages
• Create and maintain technical documentation and standards
• Recommend infrastructure improvements based on performance, scalability, and security

Cloud Infrastructure

• Deploy and administer Microsoft Azure environments
• Manage Azure Virtual Machines, Virtual Networks, VPNs, ExpressRoute, and storage services
• Support Microsoft 365 services including Entra ID (Azure AD), Exchange Online, and Intune
• Assist with cloud migrations and hybrid infrastructure designs
• Implement disaster recovery and business continuity solutions

Enterprise Storage (Critical)

The ideal candidate has experience administering enterprise storage platforms such as:

• Pure Storage
• Dell EMC Unity
• Dell PowerStore
• NetApp
• HPE Alletra / Nimble
• SAN and NAS technologies

Responsibilities include:

• Storage provisioning
• LUN creation and management
• Volume expansion
• Snapshot management
• Replication
• Performance tuning
• Storage migrations
• High Availability configurations

Experience with iSCSI, Fibre Channel, multipathing, and storage networking is highly desired.

Virtualization

• VMware vSphere
• ESXi
• vCenter
• Hyper-V
• Cluster administration
• High Availability
• Live Migration
• Storage vMotion
• Resource optimization

Advanced Networking (Critical)

Candidates should possess strong Layer 2 and Layer 3 networking experience, including:

• VLAN design and implementation
• Inter-VLAN routing
• Spanning Tree Protocol
• Link Aggregation (LACP)
• OSPF
• BGP (preferred)
• Static routing
• ACLs
• NAT
• VPN technologies
• High Availability
• QoS
• Network segmentation
• Multi-site networking

Experience with enterprise firewalls such as:

• Fortinet
• Palo Alto
• Cisco ASA / Firepower
• SonicWall

Experience configuring enterprise switches including Cisco, Aruba, HPE, or Juniper is highly preferred.

Backup & Disaster Recovery

Experience supporting:

• Veeam Backup & Replication
• Azure Backup
• Disaster Recovery planning
• Backup validation
• Restore testing
• Immutable backups

Security

• Infrastructure hardening
• Microsoft Defender
• MFA
• Conditional Access
• Zero Trust principles
• Vulnerability remediation
• Patch management

Required Qualifications

• 7+ years of enterprise infrastructure engineering experience
• Experience supporting complex multi-site environments
• Strong troubleshooting and analytical skills
• Ability to independently solve high-impact infrastructure issues
• Excellent customer communication skills
• Experience leading technical projects

Technical Requirements

Cloud

• Microsoft Azure
• Microsoft 365
• Entra ID
• Intune
• Azure Networking

Virtualization

• VMware
• Hyper-V

Storage

Experience with one or more:

• Pure Storage (preferred)
• Dell EMC
• NetApp
• HPE Alletra / Nimble
• Enterprise SAN/NAS platforms

Networking

Deep experience with:

• Layer 2 switching
• Layer 3 routing
• VLANs
• OSPF
• VPNs
• Network segmentation
• Enterprise firewalls
• Complex routing environments

Backup

• Veeam
• Azure Backup
• Disaster Recovery

Preferred Certifications

• Microsoft Azure Administrator (AZ-104)
• Azure Solutions Architect (AZ-305)
• VMware VCP
• Cisco CCNP
• Fortinet NSE
• Palo Alto PCNSA/PCNSE
• Veeam VMCE
• CompTIA Network+
• CompTIA Security+

What Success Looks Like

Successful candidates will:

• Resolve complex infrastructure issues with minimal oversight.
• Design resilient, scalable cloud and on-premises solutions.
• Optimize enterprise storage performance and availability.
• Troubleshoot complex Layer 2/Layer 3 networking issues.
• Lead infrastructure projects from planning through implementation.
• Mentor junior engineers and contribute to operational excellence.
• Deliver exceptional customer experiences while maintaining high technical standards.