Hybrid Senior Infrastructure Architect & Strategy Lead

Hamilton Barnes; Florida; Hybrid; USD 100,000 - 120,000; Full time

Benefits offered by this job

Hybrid work environment

Healthcare and retirement benefits

Professional development and certs

Job summary

Hamilton Barnes Associates Limited is seeking a Senior Infrastructure Administrator to lead design, security and long-term strategy of the enterprise IT infrastructure. This senior hands-on role combines architecture, leadership and operational ownership across Microsoft, virtualization, networking and security technologies.

You will own architecture for Windows Server and AD, drive identity initiatives, and mentor a growing infra team while partnering with IT leadership on budgets and

Qualifications

• 5+ years of infrastructure, systems or network administration experience.
• Strong Windows Server and Active Directory administration.
• Experience with Microsoft 365, Entra ID and Azure AD.
• Hands-on Cisco networking experience.
• Experience with Ubiquiti networking solutions.
• Strong virtualization experience with Hyper-V, Proxmox or VMware.
• Linux administration experience.
• Strong understanding of network security, firewalls and vulnerability management.
• Experience leading projects and mentoring technical teams.
• Excellent troubleshooting, documentation and communication skills.

Responsibilities

• Own the architecture and strategy for Windows Server and Active Directory environments.
• Lead Microsoft 365, Entra ID and identity management initiatives.
• Design and maintain Linux server standards and security baselines.
• Develop Cisco network architecture, routing, switching and segmentation strategies.
• Manage Ubiquiti network infrastructure across multiple locations.
• Lead network security initiatives including firewalls, VPNs, Zero Trust and MFA.
• Design and maintain Hyper-V and Proxmox virtualization environments.
• Drive vulnerability management, patching and infrastructure security.
• Act as the highest technical escalation point for complex infrastructure issues.
• Mentor and support junior infrastructure team members.
• Manage core infrastructure services including DNS, DHCP and monitoring platforms.
• Oversee endpoint management, Microsoft Intune and security tooling.
• Maintain infrastructure documentation, diagrams and technical standards.
• Partner with IT leadership on budgeting, vendor management and technology roadmaps.

Skills

Windows Server

Active Directory

Microsoft 365

Entra ID

Azure AD

Cisco networking

Ubiquiti networking

Hyper-V

Proxmox

VMware

Linux

Security concepts

Project leadership

Mentoring

Job description

Are you looking for an exciting new opportunity?

Join a trusted telecommunications provider delivering future-focused connectivity solutions for residential and business customers. During a significant period of growth, the organisation offers the opportunity to take ownership of long-term network strategy, lead a multi-disciplinary team, and contribute to expansion plans and executive-level decision-making.

The organization is seeking a Senior Infrastructure Administrator to lead the design, security and long-term strategy of its enterprise IT infrastructure. This is a senior hands-on technical role combining architecture, leadership and operational ownership across Microsoft, virtualization, networking and security technologies.

If you would like to learn more about this opportunity, feel free to reach out and apply today!

Key Responsibilities

• Own the architecture and strategy for Windows Server and Active Directory environments.
• Lead Microsoft 365, Entra ID and identity management initiatives.
• Design and maintain Linux server standards and security baselines.
• Develop Cisco network architecture, routing, switching and segmentation strategies.
• Manage Ubiquiti network infrastructure across multiple locations.
• Lead network security initiatives including firewalls, VPNs, Zero Trust and MFA.
• Design and maintain Hyper-V and Proxmox virtualization environments.
• Drive vulnerability management, patching and infrastructure security.
• Act as the highest technical escalation point for complex infrastructure issues.
• Mentor and support junior infrastructure team members.
• Manage core infrastructure services including DNS, DHCP and monitoring platforms.
• Oversee endpoint management, Microsoft Intune and security tooling.
• Maintain infrastructure documentation, diagrams and technical standards.
• Partner with IT leadership on budgeting, vendor management and technology roadmaps.

Required Skills/Qualifications

• 5+ years of infrastructure, systems or network administration experience.
• Strong Windows Server and Active Directory administration.
• Experience with Microsoft 365, Entra ID and Azure AD.
• Hands-on Cisco networking experience.
• Experience with Ubiquiti networking solutions.
• Strong virtualization experience with Hyper-V, Proxmox or VMware.
• Linux administration experience.
• Strong understanding of network security, firewalls and vulnerability management.
• Experience leading projects and mentoring technical teams.
• Excellent troubleshooting, documentation and communication skills.

Nice to Have

• PowerShell or Bash scripting.
• Backup and disaster recovery solutions such as Veeam.
• AWS or Google Cloud experience.
• SQL, Oracle or ERP application support.
• Cisco CCNP or Microsoft Azure certifications.
• Security+ or Linux+ certifications.
• Previous experience leading a small infrastructure team.

Benefits

• Hybrid working environment.
• Comprehensive healthcare and retirement benefits.
• Professional development and certification support.
• Opportunity to influence infrastructure strategy and technology direction.
• Clear progression into senior technical leadership.

Salary

• $100,000 - $120,000 salary depending on experience.