Find principal security Jobs in county dublin

Principal Security Engineer
Mastercard —Dublin, County Dublin
- Full-time
- Continuous improvement
- Leadership
- Communication skills
Head of Information Security, Risk & Compliance
Glanbia Foods —DUBLIN 24, County Dublin
- Master's degree
- Bachelor's degree
- No degree
Solution Sales Principal - Cyber Security
Vodafone —Dublin, County Dublin
- Full-time
- Sales
- Annual leave
Director, Digital Forensics - Principal Officer
Coimisiún na Meán —Dublin, County Dublin
- €107,081 a year
- Full-time
- Annual leave
School Caretaker
Sandymount Park ETSS —Dublin, County Dublin
- €15.50 an hour
- Full-time
- Maintenance
- English
- No degree
Quick apply
5d
2026/87 Locum Consultant Haematologist
The Rotunda Hospital —Dublin, County Dublin
- €238,221–€286,151 a year
- Full-time
Quick apply
3d
Principal People Business Partner P&T
Workday —Dublin, County Dublin
- €92,800–€139,200 a year
- Full-time
- Human resources
- AI
- Communication skills
10d
Principal Engineer
Primark —Dublin, County Dublin
- Software development
- Agile
- Communication skills
Deal Pricing and Monetization Principal, Security
Google —Dublin, County Dublin
- Full-time
- Bachelor's degree
- No degree
- Business
Senior/Principal System Safety Engineer - Rail
WSP —Dublin, County Dublin
- Part-time
- Hybrid work
- Work from home
- Gym membership
Principal Site Reliability Engineer
FIS Global —Dublin, County Dublin
- Full-time
- Azure
- AWS
- Bachelor's degree
Receptionist
SS&C Technologies —Dublin, County Dublin
- Full-time
Azure Cloud Engineer - 12 month contract
DAA —Dublin, County Dublin
- Full-time
- Azure
- DevOps
- Scripting
IT Applications Administrator
PlayStation Global —Dublin, County Dublin
- €50,700–€76,100 a year
- Hybrid work
- Microsoft Access
- Driving
- Scripting
- Wellness program
- Annual leave
10d
Principal Technical Program Management - Data Center Leasing
Microsoft —Dublin, County Dublin
- Full-time
- Engineering
- Bachelor's degree
- Organisational skills
Principal Architect (Remote – Ireland)
Hadfield Green —DUBLIN 2, County Dublin
- Remote
- System design
- Java
- Leadership
Principal Software Engineer, Amazon DynamoDB
Amazon Development Centre Ireland Limited —Dublin, County Dublin
- Full-time
- AWS
- Software development
- SDLC
Application Security Engineer
Millennium Management —Dublin, County Dublin
- Azure
- Computer Science
- Java
Principal ML Engineer
Solventum —Dublin, County Dublin
- Full-time
- Azure
- Doctoral degree
- Computer Science
Sr. Technical Program Manager, Workforce Solutions - Talent Mobility
Amazon Development Centre Ireland Limited —Dublin, County Dublin
- Full-time
- Computer Science
- Engineering
- AWS

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Principal Security Engineer

Mastercard -
Dublin, County Dublin

Apply Now

Job details

Full-time

Qualifications

Continuous improvement
Leadership
Communication skills

Full job description

Our Purpose

Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we’re helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.

Title and Summary

Principal Security Engineer

Overview
The Principal Security Engineer serves as a trusted advisor and partner to developers, providing hands‑on support, coaching, and real‑time guidance to integrate security seamlessly into the development lifecycle. This role plays a critical part in shaping how security and threat modeling is taught, adopted, reviewed, and governed across Mastercard’s development lifecycle. The focus is on making security accessible, actionable, and aligned with how developers actually build software, driving adoption through collaboration, continuous feedback, and a strong developer experience.

Role
This is a senior, hands‑on security leadership role focused first and foremost on developer enablement and engagement, responsible for driving security excellence at scale across Mastercard. The Principal Security Engineer blends deep individual‑contributor expertise with practice‑building leadership, including:
Creating scalable, developer‑friendly threat modeling collateral such as blueprints, threat libraries, and templates
Implementing and evolving threat modeling methodologies
Establishing review and governance practices that support consistent, high‑quality outcomes
Designing and delivering formal learning and enablement programs that help engineers and architects confidently apply threat modeling in their day‑to‑day work
The role partners closely with development teams to embed security naturally into workflows, ensuring security enhances—not hinders—delivery.

About You
You are a senior security practitioner with deep, hands‑on experience in threat modeling and secure software design. You are comfortable operating at scale, influencing across teams, and working directly with developers and architects. You combine technical depth with strong coaching and communication skills, and you are passionate about building practical, developer‑centric security practices. You thrive in environments where collaboration, continuous improvement, and strong developer experience are key to success.

Corporate Security Responsibility

All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:

Abide by Mastercard’s security policies and practices;
Ensure the confidentiality and integrity of the information being accessed;
Report any suspected information security violation or breach, and
Complete all periodic mandatory security trainings in accordance with Mastercard’s guidelines.

Apply Now

Refine Your Search

principal security jobs in county dublin

Principal Security Engineer

Head of Information Security, Risk & Compliance

Solution Sales Principal - Cyber Security

Director, Digital Forensics - Principal Officer

School Caretaker

2026/87 Locum Consultant Haematologist

Principal People Business Partner P&T

Principal Engineer

Deal Pricing and Monetization Principal, Security

Senior/Principal System Safety Engineer - Rail

Principal Site Reliability Engineer

Receptionist

Azure Cloud Engineer - 12 month contract

IT Applications Administrator

Principal Technical Program Management - Data Center Leasing

Principal Architect (Remote – Ireland)

Principal Software Engineer, Amazon DynamoDB

Application Security Engineer

Principal ML Engineer

Sr. Technical Program Manager, Workforce Solutions - Talent Mobility

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