Creating the conditions for success

Modern pharmaceutical production depends on a fragile equation: the right temperature, the right humidity, the right conditions, maintained hour after hour. Even a small deviation can compromise the conditions under which medicines are produced safely – potentially ruining a batch of life-saving medicines. When those conditions began to drift at the manufacturing facility in Ireland, Katie Cronin was called in to help.

Katie arrived on site and started troubleshooting the critical HVAC system straight away. She put a temporary solution in place by manually controlling the system and adjusting operating parameters. She helped maintain stable temperature and humidity while replacement parts were sourced. Once the parts arrived, she completed the task, thoroughly tested the system and returned it to normal operation.

Production didn't stop. By stabilizing the system, Katie helped the customer avoid downtime and keep operations running without interruption.

Katie is a refrigeration and air conditioning service engineer based in Cork, Ireland. She's one of more than 50,000 frontline experts across Johnson Controls who bring dedication, technical skill and real-world expertise to the spaces customers depend on.

During her first year at Johnson Controls, she’s discovered a passion for supporting pharmaceutical and healthcare customers.

“What I enjoy most is knowing that the work we do genuinely matters,” Katie said. “Seeing the relief on the customer's face when they realized production wouldn't be interrupted made it all worthwhile. It's a lot of responsibility, but that's also what makes the job interesting."

High standards, no margin for error

The environments in pharmaceutical manufacturing are tightly controlled, and standards are extremely high. The systems Katie maintains don't sit in the background. They help create the environmental conditions manufacturers rely on to safely and consistently produce medicines.

Her regular day includes carrying out maintenance and service checks on different equipment such as air conditioning units, air handling units and refrigeration equipment.

"I make sure each air conditioning unit is working as intended, clean the filters and check time schedules," Katie said.

While pharmaceutical facilities are one part of Katie's role, she also works in hospitals and other environments where maintaining the right indoor conditions is essential to daily operations. Whether she's carrying out routine maintenance or troubleshooting an issue, she keeps customers informed about what she's found, what she's doing and what comes next.

Building expertise for tomorrow

Katie's experience in these environments also shapes how she trains the next generation of service engineers. As a mentor to apprentices, she helps ensure customers have access to the expertise they need today and in the future.

“Training apprentices is one of my favorite parts of the job. Most of it happens out in the field where they can get hands-on experience, ask questions and see firsthand how things work.”

When Katie started out, people took the time to help her build confidence. Now she values doing the same for others.

“The reward is watching an apprentice go from nervous about a task to completing it independently,” Katie said.

That growth matters to the apprentice, to the team and to the customers they'll one day serve. Through apprenticeships and hands-on coaching, Katie is helping build the next generation of Johnson Controls service engineers.

Q&A with Katie

What part of your job doesn’t feel like work?

“Training apprentices. If I've helped them become a better engineer, even in a small way, that's something I'm proud of.”

What makes you feel your work really matters?

“The systems we maintain help create the conditions needed for medicines and healthcare products to be produced safely.”

What does your typical day at work look like?

“I love that no two days are the same. One day, I could be carrying out routine maintenance. The next, I could be responding to an urgent request. There's always something new to learn.”

No two days look the same for Katie. But the goal stays constant: keep mission-critical spaces running and give customers the confidence that comes from knowing someone capable is on the other end of the phone. From hospitals in Cork to pharmaceutical facilities across the region, Katie is one of thousands of Johnson Controls field experts delivering that reliability every day – where it really matters.