Senior Infrastructure Engineer

Presidio; Dublin; On-site; EUR 55,000 - 90,000; Full time

Job summary

Presidio in Dublin seeks an L3 IT Engineer for a permanent role. You will support major Enterprise clients using a stack that includes M365, VMware, Azure and VDI, with a focus on security, backups, and problem resolution.

You will own tickets, work with vendors, and maintain compliance with SLAs while growing expertise across Ergo products and managed services. This role offers on-site work in Ireland with a dynamic tech team.

Qualifications

• Experience with Microsoft environments and enterprise IT support.
• Strong knowledge of M365, Azure, AD, and security policies.
• Experience with virtualization and endpoint management tools.
• Familiarity with hybrid Exchange/Entra environments a plus.
• Professional certifications are advantageous.

Responsibilities

• Provide Level 3 IT support to local users.
• Install, configure and troubleshoot IT software and hardware.
• Perform routine security checks and backups with status reports.
• Maintain hardware/software inventories and licensing.
• Deliver on-site support and adhere to SLAs.
• Develop in-depth knowledge of Presidio products and solutions.

Skills

M365 administration

Azure administration

VMware/Hyper‑V

VDI solutions

Citrix Support

Intune configuration

Active Directory

SCCM/Endpoint management

Backup and recovery

Defender for Endpoint

Disaster recovery planning

Tools

M365

Azure

VMware

Citrix

Intune

Active Directory

SCCM

Defender for Endpoint

VDI

Job description

Presidio, Where Teamwork and Innovation Shape the Future

At Presidio, we're at the forefront of a global technology revolution, transforming industries through cutting‑edge digital solutions and next‑generation AI. We empower businesses - and their internal customers - to achieve more through innovation, automation, and intelligent insights.

The Role

Presidio are seeking an L3 IT Engineer for a permanent role in Dublin. As an L3 IT Engineer you will work with some of Ireland's top IT professionals supporting major Enterprise clients and well‑known brands using a deep technical stack which includes M365, VMware, Azure and VDI solutions.

Responsibilities

• Provide Level 3 IT support to local users
• Installing, configuring and troubleshooting of IT related software and hardware.
• Perform routine day to day system security checks and backups and produce status reports.
• Work with other technical staff to ensure connectivity and compatibility between systems.
• Work with vendors/partners to resolve complex network problems.
• Provide extended on‑site support to varied customers, as and when required.
• Assume full ownership and responsibility of all allocated support tickets ensuring they are dealt with promptly and professionally and satisfactorily concluded.
• Ensure strict adherence to SLA when dealing with customer tickets/calls.
• Develop and maintain an in‑depth technical knowledge of Ergo products, services and solutions with a view to specialisation in one or more technologies.
• Record and maintain hardware and software inventories, site and/or server licensing and user access and security.
• Provide technical training to customers when a new user or systems is implemented and is requested.

Experience

A good knowledge of and experience working with Microsoft environments including:

• Management of M365 (supporting Teams, Exchange, One Drive etc.)
• Management of Azure security components MFA/conditional access policy
• Supporting and setting up Mobile Devices (MDM)
• Experience with working with Intune configuration policies
• Good understanding and working knowledge of Microsoft Active Directory, Domain Controllers, group policies, DNS
• Good understanding of backup and restoration methods
• Windows 11 configuration, operation and management
• Windows Server 2016/2019/2022/2025 administration and maintenance
• Virtualisation (VMWare or Hyper‑V)
• Citrix Support or Administration
• Azure Administration/Configuration
• Professional certifications an advantage
• Good understanding of email filtering configuration and principals
• Experience with hybrid-Exchange environments
• Experience with hybrid Active Directory/Entra environments for both user and computer accounts an advantage
• Experience with SCCM regarding application, PatchMyPC, updates, and task sequence image based build deployments
• Experience with Defender for Endpoint configuration for both workstations and servers
• Experience with Dell VxRail, PowerStores, PowerProtect Backup & PowerProtect Cyber Recovery and advantage
• Experience with Commvault Metallic
• Understanding on Sentinel, Data Collection rules
• Experience with Disaster Recover/Cyber Recovery

Your future at Presidio

Joining Presidio means stepping into a culture of trailblazers - thinkers, builders, and collaborators - who push the boundaries of what's possible. With our expertise AI‑driven analytics, cloud solutions, cybersecurity, and next‑gen infrastructure, we enable businesses to stay ahead in an ever‑evolving digital world.

Here, your impact is real. Whether you're harnessing the power of Generative AI, architecting resilient digital ecosystems, or driving data‑driven transformation, you'll be part of an team that is shaping the future.

Ready to innovate? Let’s redefine what’s next‑together.

About Presidio

Presidio is committed to hiring the most qualified candidates to join our amazing culture. We aim to attract and hire top talent from all backgrounds, including underrepresented and marginalized communities. We encourage women, people of color, people with disabilities, and veterans to apply for open roles at Presidio. Diversity of skills and thought is a key component to our business success.

At Presidio, speed and quality meet technology and innovation. Presidio is a trusted ally for organizations across industries with a decades‑long history of building traditional‑IT foundations and deep expertise in AI and automation, security, networking, digital transformation, and cloud computing. Presidio fills gaps, removes hurdles, optimizes costs, and reduces risk. Presidio's expert technical team develops custom applications, provides managed services, and enables actionable data insights and builds forward‑thinking solutions that drive strategic outcomes for clients globally.

Applications will be accepted on a rolling basis.

Presidio has a strong commitment to the community we serve and our employees. As an Equal Opportunity Employer, we strive to have a workforce that includes the community we serve.

For more information visit https://presidio.com