As director of engineering in the U.K., Ireland and Nordics, Justine Butler is responsible for leading teams that design and deliver some of the most complex life sciences and pharmaceutical facilities in the world.
With more than 19 years of experience, she takes a proactive approach, applies strategic thinking, and demonstrates a commitment to innovation to bridge the gap between technical expertise, organizational goals and continuous improvement.

Leading a growing team of about 500 engineers - accounting for roughly 50% of Jacobs’ total Ireland Operations - Justine oversees the engineering design on a project portfolio exceeding $4 billion (€3.8 billion). As the first woman to hold this position and one of the youngest members of our leadership team in the region, her accountability and technical expertise have contributed to Jacobs’ success in shortlisted and award-winning projects.
Justine joined Jacobs after studying chemical and process engineering at University College Dublin, earning a diploma in project management from Dublin Business School and gaining experience in pharmaceutical facility design and lecturing in biopharmaceutical design with Institute of Technology, Sligo. Her passion for leadership was evident early in her career when she became the first young engineer to serve on Engineering Ireland’s Council and Executive Committee after chairing its Young Engineers committee.
Throughout her career, Justine has prioritized relationship-building with peers, management and external networks. Justine is passionate about continuous education and talent development, always encouraging her team to embrace a constant state of intellectual curiosity. In particular, Justine is dedicated to supporting more women in pursuing management positions and overcoming imposter syndrome.
Justine’s talent and commitment were recognized with the 2024 Women in STEM – Engineering award by Engineers Ireland.