Passionate about switchgear.
Here for our people.
Capital is an independent, low-voltage (LV) switchgear manufacturer providing critical power infrastructure to data centres. We operate from two fully-integrated specialist sites in Ireland, and are led by the vision of our two founders: to provide high-quality switchgear at scale and speed.
If you have people’s loyalty, they’ll go above and beyond for you. The moment it becomes purely about money, you lose what makes a company great.
Mike Sinkey, Managing Director, Capital
Our story
Small beginnings.
Big ambitions.
Capital founders, Mike Sinkey and Stephen Cullen, started the business from their kitchen table in 2012. Stephen had a family background in electrical equipment and Mike had worked in the industry for years. They saw an opportunity in Ireland for cutting-edge power infrastructure delivered in a better way – more expertise, more structure, more speed.
It proved successful. Capital quickly became a known and trusted provider, manufacturing power management solutions for ever larger organisations across the country. The company grew with engineering companies like Winthrop, Mercury and Jones, as well as airports, pharmaceutical organisations and hospitals.
Capital now focuses on developing quality switchgear solutions, at speed, for data centre operators across the world looking to scale fast and sustainably.
This is why we’ve set solid foundations for rapid growth
- Expanded to 100,000 sq ft manufacturing facility
- Optimised processes to be lean and repeatable
- Hired and trained more engineers and operatives
- Defined our sustainability goals until 2050
While many of our competitors were acquired, we’re proud to have remained independent and founder-led. Stephen and Mike are still heavily involved in the business – both our day-to-day operations and growth plans.
Our values have also remained the same: ambition, precision, integrity, commitment and perseverance, and relationships. These values, together with the vision of our founders to provide excellence in power solutions, put us on a steady course towards shared, sustainable success.
- 2012Founded by Stephen Cullen and Mike Sinkey
- 2014-16Continuous expansion, digitisation of workflows
- 2018ISO 9001, 14001 and 45001 certified
- 201950 employees, SAP Business One implemented
- 2022Rebrand to support rapid growth
- 2024Achieved EcoVadis bronze medal
- 2025Rollout of EPLAN, expanded to new facility in Rathcoole, Dublin
- 2027ISO 50001 certification, EPDs for every product
- 2050Carbon neutral, €500M turnover, 400 employees
Leadership
A hands-on independent,
leadership team
With a people-first approach and over 100 years of combined industry experience, our leadership team
remains involved in day-to-day operations and customer relationships. This enables them to stay constantly
on top of challenges faced by data centre operators.
Stephen Cullen
CEO, Co-founder
Raised in Clondalkin, Dublin, Stephen brings over 20 years’ experience in the electrical industry. His leadership is rooted in strong values, including fairness, mentorship and environmental responsibility. Stephen’s passion for technical engineering and team development has made Capital a respected name in the industry. Outside work, he enjoys staying active through golf, cycling, and spending time with his family.
“I believe in face-to-face contact with customers and am very involved in the details of our product design and production. We’re well aware of how much companies depend on us for safety, cost and timelines. It’s got to be right.”
Mike Sinkey
Manager Director, Co-founder
Born in Massachusetts, US, Mike’s journey in the electrical industry began in Ireland in the mid-90s. Since founding Capital in 2012, Mike has focused on customer relations and growth, steering Capital towards success in critical power solutions in the data centre sector. Outside work, Mike plays an active role in youth sports and his local community.
“I’m proud of our growth – from designing the first panel on my kitchen table to becoming a thriving business that partners with tech giants. Being independent, we operate to our own rules. This means that even though we’re growing rapidly, we can do it sustainably, and continue to provide the quality and excellence we’re known for.”
Deirdre Mulhern
CFOO
Deirdre helped Stephen and Mike grow Capital from its beginnings in 2012. After gaining experience in other industry-based companies, she returned to Capital in 2021. A people-focused, forward-thinking leader, Deirdre is driven by a strong belief in team empowerment and continuous education, fostering a cohesive and highly competent workforce. She’s highly experienced in streamlining business operations and helping expand Irish companies into global markets, including the USA, Germany, Sweden, Australia, and South Africa.
“I’m here because I genuinely want to see this company succeed. It’s more than a job. When you believe in the people around you and what you’re building together, that changes everything about how you show up to work.”
Paul Crawford
Sales Director
Paul is a leader with both technical and business acumen. A mechanical engineer by training, he also has a Masters in Business Studies (MBS). Paul’s an experienced general manager and commercial director with a passion for pipeline creation, forecasting and delivery. His results-driven approach has enabled him to drive growth at Capital and build a strong repeat customer base since 2018. A keen sportsman, Paul is involved with his local GAA team and runs, cycles and swims.
”In this industry, sales is not about selling. It’s about relationships and technical knowledge: getting to know businesses’ specific needs, and providing the right product at the right time to help our customers grow their business. I’m proud of the many long-term customer collaborations we have at Capital.”
Tom MacPartlin
Business Development Manager
Tom is a driven business development and product manager with over 20 years’ experience in the low-voltage electrical industry. He joined Capital in 2026 from Mitsubishi Electric. Previously, he spent seven years at our partner, ABB, where he managed key accounts supplying data centres and colocators. His deep technical knowledge, and experience working with data-centre procurement managers, positions him perfectly to help drive our quality and innovation. Tom is a former winner of the Sales Representative of the Year award at the EIFI Irish Electrical Industry Awards.
“I’m excited to join Capital at this critical phase of its growth. Capital’s products sell themselves by their quality and attention to detail, backed up with Capital’s collaborative approach. I’m looking forward to helping to ease switchgear procurement for our data centre customers.”