Infrastructure & Identity Security Engineer (Hybrid)

A2IT Technology; Oeiras; On-site; EUR 42,000 - 65,000; Full time

Job summary

A2IT Technology is seeking an Infrastructure & Identity Security Engineer to join the Systems and Identity Engineering team in Portugal. You will manage Microsoft-based infrastructure, ensuring security, availability, and operational excellence across hybrid and enterprise environments.

Responsibilities include maintaining Domain Controllers, AD, Exchange and Intune ecosystems; delivering 2nd/3rd line support; troubleshooting incidents; and producing documentation for critical national-level

Qualifications

• Minimum 12th grade or equivalent technical/professional qualification.
• Mandatory experience in infrastructure hardening and security best practices across Windows Server, AD and Microsoft 365 environments.
• 4+ years in enterprise environments, including AD, Exchange, Hybrid (On-Prem + O365), Intune, Teams, and OneDrive for Business, Microsoft FIM/MIM.
• Solid technical knowledge of Windows Server, Azure AD, SAN, Routing & Switching, Ethernet, VLAN, VPN, IPSec, QoS, TCP/IP, IPv4/IPv6.
• Microsoft certifications (AD, Azure AD, Windows Server, Exchange, Intune, SCCM) are a strong plus.

Responsibilities

• Manage and operate Domain Controllers, physical and virtual servers, SharePoint platforms, and collaboration systems.
• Provide 2nd and 3rd line support via ITSM / SMAX.
• Troubleshoot, analyze, and resolve incidents and service requests.
• Collaborate with internal teams and external service providers.
• Administer and maintain hybrid infrastructures.
• Implement technical changes and improvements.
• Produce technical documentation and operational reports.
• Support national-level entities and services.

Skills

Security best practices

Infrastructure hardening

Education

Secondary education (12th grade) or equivalent

Tools

Windows Server

Active Directory

Microsoft 365

Azure AD

Intune

Teams

OneDrive for Business

Microsoft Exchange

Job description

A2IT Technology is seeking an Infrastructure & Identity Security Engineer to join the Systems and Identity Engineering team in Portugal. You will manage Microsoft-based infrastructure, ensuring security, availability, and operational excellence across hybrid and enterprise environments.

Responsibilities include maintaining Domain Controllers, AD, Exchange and Intune ecosystems; delivering 2nd/3rd line support; troubleshooting incidents; and producing documentation for critical national-level