Sr. IT Administrator - Infrastructure, Cloud and Enterprise Platforms

Stephen Hair

***********@*******.*** 720-***-**** Bennett, CO LinkedIn Profile

Senior Systems Engineer

Senior Systems/Infrastructure/Network Engineer with extensive experience in enterprise Windows, VMware, and cloud environments (AWS, Azure). Holds many certifications and has a strong record of leading virtualization, optimization, and migration initiatives for global organizations. Proven ability to reduce infrastructure costs, improve performance and stability, and operate in compliance driven environments (SOX, SOC1, PCI). Known for hands on problem solving, reliability, and excellent communication with both technical and business stakeholders.

Certifications and Core Skills

Microsoft Certified Systems Engineer (MCSE)

Windows Server, Active Directory, Entra ID, Domain Admin, Networking (TCP/IP, DNS, DHCP, Load Balancing, Certificate Management), SQL Clusters, IIS Administration

Microsoft Certified: Azure Administrator Associate

Azure Administration, Operations, and Migrations, Hybrid Cloud Administration, M365 Admin

Microsoft AZ-305 Training – Designing Microsoft Azure Infrastructure Solutions

Engineering and implementing Azure cloud architectures for enterprise environments

Security Training - Microsoft Security Operations Analyst & Microsoft Cybersecurity Architect

IBM Turbonomic 8 Cloud ARM Master – FinOps & Capacity Optimization

AWS Certified Solutions Architect – Associate – AWS Administration, Operations,& Migrations

Dell / EMC Training

EMC CLARiiON SAN Setup / Configuration, Storage Administration, & FC Fabric Admin

Broadcom VMware vSphere: Install, Configure, Manage & Operate, Scale and Secure [V8]

VMware Administration, Server Virtualization, High Availability, Disaster Recovery, etc

Career Summary and Achievements

Aon Corp. – Sr. IT Administrator - Infrastructure, Cloud and Enterprise Platform Services

Denver, CO July, 2011 – February, 2026

Supported over 10,000 physical and virtual Windows servers located in over 20 global data centers (VMware, Hyper-V) and in our hybrid cloud – Azure, AWS, and VMware Cloud on AWS.

Supported migrations of key applications to AWS and Azure to reduce capital expenditures and facilitate a cloud-first strategy.

Reviewed Azure architecture diagrams / design docs to ensure compliance with company standards and best practices.

Lead Systems Engineer for a web application across multiple US and Canadian data centers, supporting 100+ Windows servers (IIS, BizTalk, SQL clusters). Drove full virtualization into VMware - improving scalability and reducing hardware/maintenance costs.

Domain Administrator: managed multidomain AD, users, groups, GPOs, login scripts; administered DNS, vanity URLs, redirects, and certificates in loadbalanced environments.

Led global deployment and administration of IBM Turbonomic, right-sizing thousands of Windows and Linux servers onprem and in the cloud, reducing overprovisioning, reducing major incidents, and delivering multimilliondollar cost savings.

Automated processes with PowerShell scripts to reduce labor and increase efficiency.

Produced and maintained technical documentation for products and for Major Incidents.

Promoted in 2024 with added responsibilities for mentoring and project management.

NC Dept. of Public Instruction – Raleigh, NC – Windows Server Administrator / VMware Admin

March 2005 – July 2011

Managed 90+ Windows servers (NT/2000/2003/2008) across Dell, Compaq, and VMware platforms in a multidomain Active Directory environment.

Designed and implemented a Windows Server 2003 AD domain and successfully migrated all servers, improving manageability and security.

Integrated identity management by synchronizing accounts between Active Directory and Novell eDirectory using DirXML.

Administered an EMC CLARiiON SAN, including Fibre Channel fabric, storage allocation, and performance monitoring.

Supported SQL clusters, the VMware environment, and SAS systems, ensuring stable and performant infrastructure for critical applications.

Acted as a senior systems resource for troubleshooting, capacity planning, and escalation.

Education

HighTech Institute – Phoenix, AZ – Associate of Occupational Studies in Computer Electronics

I had the privilege of managing Stephen Hair during my tenure at Aon. Stephen consistently demonstrated a strong work ethic and an unwavering commitment to delivering exceptional service and support, which ultimately led to his promotion and expanded responsibilities, including product ownership.

Stephen brings expert-level experience in Windows Server administration, VMware environments, cloud provisioning and support, and Turbonomic. As the product owner for Turbonomic, he played a critical role in optimizing both on-premises and cloud infrastructure. His passion and persistence drove measurable cost savings and operational efficiency across the organization.

In addition to his technical expertise, Stephen actively influenced product direction by providing thoughtful recommendations that were incorporated into subsequent Turbonomic releases. He took ownership of virtual infrastructure performance, ensuring it operated efficiently, reliably, and cost-effectively.

I highly recommend Stephen for any role requiring strong technical leadership, operational excellence, and a proactive, results–driven mindset.

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