Infrastructure & Microsoft Cloud Platform Lead

Job Summary and Responsibilities

Circet USA’s IT is currently largely supported by its sister company, KGP Telecommunications. Circet Group has a strategy to build an independent IT team for Circet USA.

The Infrastructure Lead is responsible for designing the Microsoft-based target architecture for this new environment and the project plan to move away from the legacy environment, in accordance with the project team (the group CISO, an infrastructure consultant, the KGP IT team). This role will then be responsible for implementing and operating this new core IT infrastructure, executing the split and transitioning other acquisitions to this environment.

This role combines technical leadership, day-to-day oversight of infrastructure services, and significant hands‑on engineering work across network, servers, cloud, and end‑user platforms. This role establishes Microsoft Azure and Microsoft 365 as the core enterprise platforms for infrastructure, identity, collaboration, security, and endpoint management.

The ideal candidate is comfortable defining strategy, standards, and governance while also rolling up their sleeves to build, configure, and support systems directly.

ESSENTIAL DUTIES & RESPONSIBILITIES include the following. Other duties may be assigned:

Competencies summary:

• Azure
  :
  IaaS/PaaS, Landing Zones, networking (VNets, VPN, peering), security (NSGs, Firewall, Private Endpoints), monitoring.
• Microsoft 365
  :
  Entra , Conditional Access, MFA, PIM, Intune, Defender, Exchange Online security.
• Systems
  : hybrid AD, DNS, DHCP, certificates, backup and DR.
• Networking
  : strong fundamentals, firewalls, advanced troubleshooting.
• Security
  :
  Zero Trust, least privilege, hardening.
• Operations
  : run, complex incident handling, patching, documentation.
• Automation
  :
  Power Shell, basic IaC exposure.
• Profile
  : very hands‑on, autonomous, structured, executes a defined framework without reinventing it.

Strategy and leadership

• Own the overall infrastructure strategy and roadmap (on‑prem, cloud, network, storage, backup, endpoints) in alignment with business and security priorities.
• Define infrastructure standards, patterns, and best practices for availability, performance, security, and scalability.
• Own the Microsoft Cloud Adoption Framework (CAF) for Circet USA, including identity, networking, security, governance, landing zone design and platform automation aligned with Microsoft best practices.
• Apply the Microsoft Well‑Architected Framework to platform and workload designs across security, reliability, cost optimization, performance, and operational excellence.
• Define and maintain Azure and Microsoft 365 architectural standards for all new workloads and acquisitions.
• Act as the primary infrastructure point of contact for IT leadership, security, applications, and business stakeholders.
• Provide technical leadership to a small team of engineers/administrators and any external partners, including informal mentoring and code/review of configurations.

Design and implementation

• Architect and implement network, system, and cloud solutions, with a focus on Azure landing zones, virtual networks, subnets, firewalls, and hybrid connectivity.
• Build and manage Microsoft Azure IaaS and PaaS environments, including compute, storage, networking, and platform services.
• Define and implement Azure subscription and management group hierarchy, resource group standards, naming/tagging conventions, and Azure Policy baselines.
• Implement and maintain core infrastructure services such as Active Directory/Microsoft Entra  (including Conditional Access, MFA, device‑based access controls, and application integrations), DNS, DHCP, certificates, and identity integrations.
• Lead infrastructure components of key projects (e.g., new site deployment, application rollouts, migrations, security initiatives).

Operations and support (hands‑on)

• Perform advanced troubleshooting of infrastructure issues (network, servers, cloud resources, storage, backups) and drive problem resolution.
• Configure, monitor, and maintain systems, including patching, updates, capacity management, and performance tuning.
• Implement and operate monitoring, alerting, and logging tools; proactively address…