Senior Infrastructure Engineer

The Senior Network and Infrastructure Engineer plays a critical role in designing deploying and maintaining the core infrastructure that supports D2Ls global operations. This role blends deep technical expertise in enterprise networking and cloud infrastructure with a focus on ensuring high availability performance scalability and security across both onpremises and cloud environments including platforms such as AWS and Azure.

The engineer will be responsible for managing the full lifecycle of physical network components (Aruba switches firewalls access points) and virtual network configurations in Azure. They will lead projects optimize infrastructure performance implement automation and ensure all systems are documented and compliant with security standards. The ideal candidate is a strong collaborator capable of mentoring peers driving technical decisions and owning network architecture end to end.

Major Responsibilities:

Operations and Maintenance
Enterprise Network Architecture & Maintenance
Design deploy and support LAN/WAN wireless and VPNs across physical and cloud environments. Maintain accurate documentation of network designs IP schemes and architecture decisions.
Cloud Networking (Azure Focused)
Build and maintain Azure virtual networks NSGs route tables and hybrid connectivity (e.g. ExpressRoute SitetoSite VPN). Document cloud configurations routing paths and integration points with onpremises networks.
Network Security & Access Control
Configure and maintain firewalls NAC solutions (e.g. ClearPass) and remote access policies. Create and update security policy documentation access control lists and audit logs.
Hardware Lifecycle Management
Perform hardware upgrades replacements and lifecycle tracking for switches firewalls and access points. Maintain inventory records lifecycle schedules and deployment documentation.

Monitoring and Automation
Network Monitoring
Monitor network health using Aruba Central SNMP and NetFlow. Document monitoring thresholds alert response playbooks and historical performance data.
Automation of Network Tasks
Automate repetitive tasks using scripting or orchestration tools (e.g. PowerShell Ansible Python). Maintain script repositories with usage documentation change logs and automation workflow diagrams.
Availability and Fault Management
Ensure uptime by implementing automated failover mechanisms and redundancy strategies. Document high availability configurations redundancy paths and incident response procedures.

Optimization and Performance Tuning
Traffic Analysis and Bandwidth Optimization
Analyze traffic patterns optimize routing and apply QoS policies. Document tuning outcomes performance benchmarks and historical trend data.
Capacity Planning
Project future network demands and scale infrastructure to support growth. Maintain capacity reports utilization forecasts and growth models.
Configuration Standardization
Enforce consistent and secure configurations across all network devices using templates and automation. Maintain versioncontrolled configuration standards and update logs.

Collaboration and Support
Escalation and Subject Matter Expertise
Act as the technical authority and escalation point for complex network issues. Document troubleshooting processes RCA reports and known issue resolutions.
Project Participation
Provide technical input for infrastructure projects ensuring proper network design integration and scalability. Maintain projectspecific documentation and implementation plans.
CrossTeam Troubleshooting
Partner with infrastructure application and support teams to diagnose and resolve networkrelated problems. Log and document resolutions in accordance with team procedures.
Documentation and Knowledge Sharing
Own and maintain all networkrelated documentation including topology diagrams SOPs runbooks and knowledge base articles. Provide documentationbased training and guidance for peers and junior engineers. Participate in formal yearly documentation reviews and ensure outdated documents are revised archived or removed in accordance with governance policies.
Change Management Participation
Prepare and document change records risk assessments and rollback plans for all network modifications. Follow ITILaligned change control processes and maintain detailed records.

WHAT YOULL BRING TO THE ROLE:

Competencies:
Strong technical troubleshooting and diagnostic skills across complex networked environments.
Effective communicator and collaborator across infrastructure security and project teams.
Strong understanding of security best practices in networking and cloud environments.
Excellent documentation knowledgesharing and mentoring abilities.
Strategic mindset with the ability to align infrastructure with business goals and growth.

Suggested Qualifications/Experience:
Networking Expertise:
5 years of experience with physical and virtual networking including enterprise technologies such as switching routing VLANs QoS VPNs and advanced network security and design.
Cloud Infrastructure (Azure):
2 years of handson experience with Azure InfrastructureasaService (IaaS) including virtual networking (VNETs NSGs routing peering and hybrid connectivity).
Aruba Network Technologies:
Proven experience with Aruba infrastructure including Aruba Central and ClearPass for network management and access control.
Infrastructure Operations & Microsoft Ecosystem:
Experience with Windows Server and Windows desktop operating systems Office 365 Active Directory SCCM MDM solutions and infrastructure patching and maintenance.
Monitoring and Resiliency:
Strong background in infrastructure monitoring as well as implementing database backups high availability (AlwaysOn) and disaster recovery strategies.
Automation and Infrastructure as Code:
Proficient in scripting and automation tools such as PowerShell Python and Ansible; familiar with configuration management and version control practices.
Certifications (Preferred):
Aruba Certified Azure Administrator/Architect CCNA/CCNP Network Security.

Required Experience:

Senior IC