Senior Infrastructure EngineerPegasus Technology Solutions • Plano, Texas, United States
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Senior Infrastructure Engineer
Pegasus Technology Solutions
- Plano, Texas, United States
- Plano, Texas, United States
About
The Senior Infrastructure Engineer is a highly skilled technical subject matter expert (SME) responsible for the design, implementation, administration, and optimization of enterprise IT infrastructure across on-premises and cloud environments. This role operates within our Professional Services team, delivering complex infrastructure engagements for clients while also providing Tier 3/4 escalation support to the Network Operations Center (NOC). The ideal candidate possesses deep expertise in virtualization, hybrid cloud architecture, network engineering, and Microsoft enterprise technologies, and thrives in a fast-paced, client-facing managed services environment.
Key Responsibilities
Professional Services & Project Delivery
* Lead and execute client-facing infrastructure projects including assessments, migrations, deployments, and technology refreshes.
* Architect and implement virtualization solutions using VMware vSphere/vCenter and Microsoft Hyper-V in both greenfield and brownfield environments.
* Design and deploy hybrid and cloud-native solutions leveraging Microsoft Azure, including IaaS, PaaS, and identity services.
* Produce detailed project documentation including solution design documents (SDDs), network diagrams, runbooks, and as-built documentation.
* Communicate effectively with clients throughout project lifecycles, setting expectations and delivering professional outcomes.
NOC Escalation Support
* Serve as Tier 3/4 escalation point for complex incidents escalated from the NOC involving infrastructure, network, virtualization, or cloud components.
* Analyze root cause of recurring incidents and implement permanent remediation strategies.
* Mentor and provide technical guidance to NOC analysts on complex infrastructure topics.
* Contribute to the development of knowledge base articles, runbooks, and escalation procedures.
Virtualization Administration
* Administer, maintain, and optimize VMware vSphere environments including ESXi hosts, vCenter, vSAN, NSX-T, and related components.
* Manage Hyper-V clusters, live migrations, replication, and failover configurations in Windows Server environments.
* Plan and execute virtual machine migrations between platforms (P2V, V2V, on-premises to Azure).
* Implement and maintain backup/recovery solutions for virtual infrastructure (Veeam, Azure Backup, Site Recovery).
* Perform capacity planning, performance tuning, and resource optimization across virtual environments.
Network Administration & Configuration
* Design, configure, and troubleshoot LAN/WAN infrastructure including switching, routing, VLANs, and inter-VLAN routing.
* Administer and configure network equipment from Cisco, Fortinet, Palo Alto, or equivalent enterprise vendors.
* Implement and manage firewall policies, NAT, VPN (site-to-site, client-to-site), and network segmentation strategies.
* Apply OSI model Layer 2–6 concepts to diagnose application-layer connectivity issues across server and application ecosystems.
* Configure and maintain SD-WAN solutions, QoS policies, and network monitoring platforms.
* Perform packet analysis and traffic inspection for troubleshooting complex application and protocol issues.
Microsoft Azure & Cloud Services
* Deploy and manage Azure infrastructure including Virtual Machines, Virtual Networks (VNets), NSGs, Load Balancers, and Azure Firewall.
* Administer Microsoft Entra ID (formerly Azure AD), including user/group management, conditional access policies, MFA, and identity governance.
* Implement and manage Azure hybrid connectivity (ExpressRoute, VPN Gateway, Azure Arc).
* Manage Azure subscriptions, resource groups, RBAC, and Azure Policy for governance and compliance.
* Architect and maintain Azure-based disaster recovery solutions using Azure Site Recovery and geo-redundant storage.
* Monitor and optimize Azure resource utilization and cost management using Azure Monitor, Log Analytics, and Cost Management tools.
Microsoft On-Premises & Hybrid Identity
* Administer Active Directory Domain Services (AD DS) including domain controllers, GPOs, OUs, sites, and trusts.
* Manage Active Directory Certificate Services (AD CS), DNS, DHCP, and File Services in enterprise environments.
* Administer Microsoft 365 (M365) services including Exchange Online, SharePoint Online, Microsoft Teams, and OneDrive.
* Deploy and manage Microsoft Intune for endpoint management, MDM/MAM policies, and Autopilot provisioning.
* Implement and manage Azure AD Connect/Entra Connect Sync for hybrid identity synchronization.
* Manage and troubleshoot hybrid Exchange environments and mailbox migrations to Exchange Online.
Security & Compliance
* Implement security hardening practices across server, network, and cloud environments in alignment with CIS benchmarks and industry best practices.
* Administer and maintain endpoint security solutions including Microsoft Defender for Endpoint and server-level antivirus/EDR.
* Assist with vulnerability assessments and remediation activities as directed by security leadership.
* Ensure infrastructure configurations align with client compliance requirements (HIPAA, SOC 2, NIST, etc.) as applicable.
On-Call & Incident Response
* Participate in a structured on-call rotation providing after-hours response to critical infrastructure incidents.
* Respond to and resolve Severity 1/2 incidents within defined SLA windows.
* Conduct post-incident reviews and document lessons learned to improve future response.
Required Qualifications
* 7+ years of progressive experience in infrastructure engineering, systems administration, or network engineering roles.
* Demonstrated SME-level expertise in VMware vSphere and/or Microsoft Hyper-V.
* Hands-on experience with Microsoft Azure services including networking, compute, identity (Entra ID), and security.
* Strong understanding of OSI model layers 1–7 with practical application to server and application ecosystem troubleshooting.
* Proficiency in Active Directory, DNS, DHCP, Group Policy, and hybrid identity with Entra Connect.
* Experience with enterprise switching and routing (Cisco, Fortinet, or equivalent).
* Experience configuring and managing firewalls, VPNs, and network segmentation.
* Familiarity with ITIL framework and working within ticketing/PSA systems (ConnectWise, ServiceNow, or similar).
* Strong verbal and written communication skills; ability to document technical work clearly for both technical and non-technical audiences.
Preferred Qualifications
* Experience in a Managed Service Provider (MSP) or professional services environment.
* Exposure to VMware NSX-T, vSAN, or Horizon virtual desktop infrastructure (VDI).
* Experience with Infrastructure as Code (IaC) tools such as Terraform, Bicep, or ARM templates.
* Familiarity with PowerShell scripting for automation of infrastructure tasks.
* Experience with backup and DR platforms: Veeam, Datto, Azure Site Recovery.
* Exposure to SIEM platforms and security monitoring (Microsoft Sentinel, Splunk).
* Experience with SD-WAN platforms (Meraki, VeloCloud, Fortinet SD-WAN).
Certifications
One or more of the following certifications are strongly preferred or required:
Required (at least one)
* Microsoft AZ-104 (Azure Administrator)
* VMware VCP-DCV
* Cisco CCNA or CCNP
* Fortinet NSE 4/5 or equivalent
Preferred
* Microsoft AZ-305 (Azure Solutions Architect)
* Microsoft MS-102 (M365 Administrator Expert)
* CompTIA Network+ or Security+
* ITIL Foundation
Work Environment & Schedule
* Primary work location: Pegasus Technology Solution’s office. Hybrid or on-site schedule depending on project and client requirements. Working remotely is permitted when possible.
* Participation in an on-call rotation
* Occasional travel to client sites within the DFW metro and surrounding regions (estimated < 20%).
* Must be available for occasional planned after-hours maintenance windows in coordination with clients and internal teams.
Compensation & Benefits
* Competitive base salary commensurate with experience
* Health, dental, and vision insurance.
* 401(k) with company match.
* Professional development budget including certification exam fees and training.
* Paid Time Off (PTO), company holidays, and flexible scheduling.
We are an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, or veteran status.
Pay: $125,000.00 - $175,000.00 per year
Benefits:
* 401(k)
* 401(k) matching
* Dental insurance
* Flexible spending account
* Health insurance
* Health savings account
* Life insurance
* Paid time off
* Parental leave
* Professional development assistance
* Referral program
* Retirement plan
* Vision insurance
Application Question(s):
* How many years experiece do you have with virtualization?
* How many years experiece do you have with network administration?
License/Certification:
* Microsoft AZ-104 (Azure Administrator) (Preferred)
* VMware VCP-DCV (Preferred)
* Cisco CCNA or CCNP (Preferred)
* Fortinet NSE 4/5 or equivalent (Preferred)
Work Location: In person
Languages
- English
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