About Us
Callista supports complex engineering projects in the biotech, pharmaceutical and high-end food industries. Based in the Netherlands and Switzerland, we work with more than 150 consultants on international, multidisciplinary projects.
With our consulting expertise, personal approach and commitment, we deliver maximum impact and build long-term partnerships for our clients' success.
Callista supports complex engineering projects in the biotech, pharmaceutical and high-end food industries. Based in the Netherlands and Switzerland, we work with more than 150 consultants on international, multidisciplinary projects.
MICA Mindset
MASTERY
Competent & Ambitious
We can only achieve the best results with the best people. Ultimately, the success of a project depends largely on the people working on it. That's why at Callista we consistently rely on consultants with above-average professional and personal skills and ambition.
INTEGRITY
Enterprising & Honest
Our goal is always the long-term business success of all involved - for our clients, consultants and ourselves. This attitude has always been our driving force. Therefore, at Callista we always think and act in an entrepreneurial and transparent way. Because we can only be successful together if there is a benefit for everyone involved in the project.
CARING
Customized & Personalized
Customized solutions to our clients' individual challenges are of great importance to us. Therefore, we focus on customized solutions for projects, both in terms of approach and result. We always develop these in close personal cooperation with our customers and consultants.
AGILITY
Lean & Efficient
The more efficiently we achieve our goal, the more satisfying the project work and result for all involved. That's why at Callista, we organize ourselves as lean and efficient as possible.
This is reflected in our short lines of communication and direct owner involvement.
Callista in figures
50+
Customers
2010
Founded
150+
Consultants
700+
Engagements
Callista not only provides services within the life sciences engineering industry, but also supports market leaders in IT. Find out more about Callista Group's services here: https://www.callista-group.com
Management
Caroline Roeleveld
Managing Partner
Jethro Oudenbroek
Chairman Callista Group
Roland Pieringer
Boardmember Callista Group
Our team
Ralf
Recruitment Lead
Kasia
Business Services Officer
Reshen
Maintenance Project Engineer
Boris
Senior Civil Engineer
Xenia
C&Q Project Engineer
Said
Automation Engineer
Fiona
C&Q Project Engineer
Sam
Senior E&I Engineer
Nicole
Maintenance Project Engineer
Hong Yang
Junior Automation Engineer
Daniel
Instrumentation Engineer
Bryan
Internal
Do you want to be among them soon? Then quickly check out our vacancy page!
Success Stories
"As a C&Q Engineer, I played a key role in the successful delivery of our client's Suite3 project.
. With tight deadlines and limited resources, the project was at risk of being compromised both in terms of schedule and product integrity.
To address these challenges, I implemented a structured qualification strategy with detailed documentation and compliance checks at each stage.
By working closely with cross-functional teams, we identified potential bottlenecks early and developed proactive solutions.
Short and continuous lines of communication ensured the project stayed on schedule.
The result was on-time delivery of the project, which met all quality and regulatory standards. This approach led to a significant reduction in extra work and compliance delays, resulting in high customer satisfaction and enhancing Callista's reputation. This experience highlighted the importance of early qualification planning and clear communication for future projects."
Taurusavenue 3
2132 LS Hoofddorp
© 2025 Callista
© 2025 Callista