Enterprise Architect

Current‑state discovery, architecture assessment, and rapid mapping across applications, infrastructure, integrations, data, and business capabilities—primarily in an M&A or transformation context.

This role will be on a 6/12 Month FTC

Summary

We are seeking an Enterprise Architect to lead current‑state discovery and architecture assessment across technology and business domains. This role focuses on rapidly building an accurate picture of the as‑is environment using EA tooling (e.g., LeanIX) and structured discovery techniques to support integration planning, sequencing, and decision‑making.

Responsibilities

Conduct current‑state architecture discovery and assessments across acquired or complex environments.
Perform rapid asset inventory and mapping, including applications, infrastructure, integrations, and data flows.
Build and maintain application portfolio maps, integration diagrams, and infrastructure views.
Map data flows, business processes, and business capabilities, aligning technology assets to business outcomes.
Capture cost elements tied to applications and platforms to support rationalisation and prioritisation decisions.
Assess CI/CD maturity and delivery pipelines where relevant.
Define and document integration architecture patterns and constraints to inform future‑state planning.
Use EA tools (e.g., LeanIX) to model, analyse, and communicate findings clearly to technical and executive stakeholders.
Partner with program, engineering, and business teams to translate discovery outputs into actionable inputs for integration roadmaps and execution plans.

Required Skills / Experience

Strong enterprise architecture experience with hands‑on current‑state discovery and assessment.
Proven proficiency with EA tools (LeanIX preferred or equivalent).
Experience mapping:
- Application portfolios
- Infrastructure and hosting environments
- System integrations and interfaces
- Data flows and dependencies
- Business processes and capabilities
Ability to work quickly in ambiguous environments and produce clear, decision‑ready artifacts.
Strong communication skills—able to explain complex architectures simply.

Nice to Have

M&A or large‑scale integration experience.
Experience supporting application rationalisation or tenant consolidation efforts.
Familiarity with DevOps / CI‑CD maturity assessments.

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We are Grant Thornton

Grant Thornton Ireland is rapidly approaching 3,000 people, in 9 offices across Ireland, Isle of Man, Gibraltar and Bermuda. With a presence in over 149 countries around the world and a global network of 73,000 people, we bring our clients the local knowledge, national expertise and global presence to help them succeed – wherever they’re located.

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A Career at GT

Looking for a more fulfilling role in professional services? One where fresh thinking, collaboration and diversity are valued? At Grant Thornton we do things differently.

What does this mean for you?

A career in a more inclusive working environment, a more collaborative work culture, a more supported, flexible working role, more possibilities to grow and more opportunities to help shape the future for your clients. We respect and value your experience. And we want you to bring your authentic self to work and be at your best. It is how it should be.

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Our Benefits

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Equity, diversity and inclusion
At Grant Thornton, we provide equitable opportunities for all our colleagues. We are a responsible, sustainable business where equity, diversity and inclusion (ED&I) is at the forefront of our workplace culture agenda, and today, we continue to build and develop on our existing ED&I structure and strategy to meet our workplace culture needs. People are at the heart of our business and teams built with varied individuals present diverse viewpoints, which need to be heard and valued.

We are all at our best when we are able to be ourselves and we view integrity and authenticity as integral values to bring to our day-to-day work-life at the firm. We are excited to see the personality and perspectives you will bring to our team because we know we will all benefit from them. Diversity of thought, background and experience enables better decision-making, improves the quality of our delivery, and helps us to meet the needs of our clients. Our firm is built on people and their ideas, so we want to hear all the new perspectives and fresh thinking you have to offer. You form the bedrock of our firm’s best-practice principles and we will champion you as leaders from day one.

Reward and benefits
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Recognition
We want to create a culture of recognition and celebrating success, by saying thank you to people who surpass our expectations and recognising the right values and behaviours. Our Shout Out recognition scheme is our way of highlighting and promoting achievements. Whether you simply want to say thank you, celebrate a special occasion or give an award for doing something exceptional, you can do all of this and more through the scheme.

Enterprise Architect

Job Description