Find Senior microsoft security Jobs in Dublin, D

IT Systems Administrator – Contract (Dublin, Ireland)
Hadfield Green —DUBLIN 2, County Dublin
- Windows
- Linux
- Communication skills
Cyber Advisory BRS – Data Protection Senior Consultant
Grant Thornton —Dublin, County Dublin
- Full-time
- Bachelor's degree
- Mentoring
- AI
Head of Engineering (Europe, 100% remote)
LimeFlight —Dublin, County Dublin
- Full-time
- Remote
- Azure
- English
- Bachelor's degree
6d
Senior Associate, IT, AzureOps Engineer
MUFG Investor Services —Dublin, County Dublin
- Full-time
- Azure
- Computer Science
- DevOps
- Annual leave
- Gym membership
Quick apply
9d
Senior Associate, IT, Network Engineer (Fixed Term Contract - 12 Month)
MUFG Investor Services —Dublin, County Dublin
- Full-time
- Azure
- Computer Science
- AWS
Quick apply
Senior Software Development Engineer, AWS RDS SQL Server
Amazon Development Centre Ireland Limited —Dublin, County Dublin
- Full-time
- Oracle
- Computer Science
- Java
Electronic Communications Surveillance Analyst
Bloomberg —Dublin, County Dublin
- Microsoft Powerpoint
- Microsoft Word
- Microsoft Excel
2d
Senior Data & Analytics Engineer (Europe, 100% remote)
LimeFlight —Dublin, County Dublin
- Full-time
- Remote
- Azure
- English
- SQL
Quick apply
EMEA Scheduling Manager
Amazon Data Services Ireland Limited —Dublin, County Dublin
- Full-time
- Microsoft Powerpoint
- Microsoft Word
- Microsoft Excel
3d
Senior Cloud Engineer
Sprinklr —Dublin, County Dublin
- Full-time
- Azure
- Management
- Social media management
- Annual leave
Senior Manager Data Architecture and AI
Aptiv plc —Dublin, County Dublin
- Azure
- Computer Science
- Java
- Gym membership
Air Export Coordinator
Nippon Express Europe GmbH —Dublin, County Dublin
- Full-time
- Hybrid work
- Microsoft Word
- Microsoft Excel
- Microsoft Office
- Free parking
Quick apply
Data Risk & AI Security | Senior Associate | Cyber Consulting | Advisory
PwC —Dublin, County Dublin
- Full-time
- Azure
- Computer Science
- Bachelor's degree
Cyber Incident Response & Digital Forensics (DFIR), Vice President
The Bank of New York Mellon Corporation —Dublin, County Dublin
- Full-time
- Analysis skills
- Communication skills
AI Engineering Lead - Senior Manager - Data & AI - Technology Consulting - Advisory
PwC —Dublin, County Dublin
- Full-time
- Azure
- Research
- SQL
Senior Systems Analyst
Sensori —Dublin, County Dublin
- €75,000–€80,000 a year
- Full-time
Quick apply
7h
AI Engineer
CR2 —Dublin, County Dublin
- Hybrid work
- Computer Science
- Java
- SQL
Quick apply
13d
Health & Safety Engineer Construction, AWS Data Centers
Amazon Data Services Ireland Limited —Dublin, County Dublin
- Full-time
- Microsoft Office
- Master's degree
- AWS
18h
Pricing Analyst II
FIS Global —Dublin, County Dublin
- Full-time
- Microsoft Excel
- Finance
- Analysis skills
10d
Senior Staff Engineer
MongoDB —Dublin, County Dublin
- Hybrid work
- Azure
- Java
- AWS

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IT Systems Administrator – Contract (Dublin, Ireland)

Hadfield Green
DUBLIN 2, County Dublin

Apply Now

Job details

Qualifications

Microsoft Windows Server
Ansible
CCNA
Process improvement
Windows
Network protocols
REST
VMWare
Linux
Communication skills
Python
Active Directory

Full job description

Hadfield Green is recruiting a senior IT Systems Administrator to serve as technical lead on a significant Cyber Security infrastructure programme within a critical, always-on operational environment. Specialising in Microsoft technologies, this role bridges the IT Operations function and the Cyber Security Project Team — responsible for the design, planning, and delivery of security-driven infrastructure change.

You will work closely with internal and external stakeholders to build infrastructure and security architectures that meet business objectives, regulatory expectations, and strict service-level and availability requirements.

What You’ll Do

Key Responsibilities

Serve as technical lead for Cyber Security infrastructure initiatives in a live 24/7 environment
Develop and implement industry best-practice infrastructure designs ensuring scalability, resilience, and security
Manage vulnerability assessment and security patch management programmes
Implement and test high-availability and disaster recovery strategies
Produce high-quality documentation for internal and external audit purposes
Provide infrastructure and security performance monitoring against agreed SLAs
Resolve escalated technical issues from first and second line support
Mentor junior staff and contribute to ongoing process improvement

Skills Required

MCSA, MCP and/or CCNA certified with expert-level Windows Server 2019/2022/2025 implementation, administration, and Windows 11 client OS skills
Deep knowledge of Active Directory, Group Policy, network protocols, and concepts
Strong experience with backup solutions and principles; NetBackup knowledge an advantage
Proven analytical and problem-solving skills with the ability to work both independently and collaboratively across all levels of seniority
Strong organisational, documentation, and communication skills with proven experience working under strict process control methodologies such as ITIL
Virtual platform (VMware), storage technology, and Linux (RedHat/OEL) experience desirable
Proficiency with automation tools including Python, Ansible, and REST APIs desirable

Send your CV outlining your suitability for the role via the apply now button.

Apply Now

Refine Your Search

senior microsoft security jobs in dublin, d

IT Systems Administrator – Contract (Dublin, Ireland)

Cyber Advisory BRS – Data Protection Senior Consultant

Head of Engineering (Europe, 100% remote)

Senior Associate, IT, AzureOps Engineer

Senior Associate, IT, Network Engineer (Fixed Term Contract - 12 Month)

Senior Software Development Engineer, AWS RDS SQL Server

Electronic Communications Surveillance Analyst

Senior Data & Analytics Engineer (Europe, 100% remote)

EMEA Scheduling Manager

Senior Cloud Engineer

Senior Manager Data Architecture and AI

Air Export Coordinator

Data Risk & AI Security | Senior Associate | Cyber Consulting | Advisory

Cyber Incident Response & Digital Forensics (DFIR), Vice President

AI Engineering Lead - Senior Manager - Data & AI - Technology Consulting - Advisory

Senior Systems Analyst

AI Engineer

Health & Safety Engineer Construction, AWS Data Centers

Pricing Analyst II

Senior Staff Engineer

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