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

Project Engineer

Xenia

C&Q Project Engineer

Wander

Project Manager

Said

Automation Engineer

Fiona

C&Q Project Engineer

Sam

E&I Project Engineer

Nicole

Maintenance Project Engineer

Hong Yang

Automation Engineer

Bryan

Internal

Lex

Project Manager

Konrad

Project Engineer

Pien

Project Engineer

Nicole

Technical Document Control

Do you want to be among them soon? Then quickly check our vacancy page!

Taurusavenue 3

2132 LS Hoofddorp

Contact

+31 (0)23 808 0311

© 2025 Callista

© 2025 Callista