About us

About us

We make the world a healthier place.

Chrestos is the only statistical health consultancy on the market. Founded in 2006, our company has been headquartered in Essen since 2016. The company is run by Dr. Boris Weimann and Janina Buschmann. Our team consists of statisticians, economists, data scientists as well as experts in the field of health care management.

The company comprises of three business divisions. In the business division CHM (Corporate Health Management) we accompany our customers on their way to a sustainable and successful Corporate Health Management system. In the CRO division (Contract Research Organization) we support our customers in planning and analysing clinical studies. In our third business division CTW (Chrestos Temporary Work) we offer our customers maximum flexibility in order to support them in the area of health in their companies if required.

Our values

What we stand for, what we strive for and the way we work.

Health is a matter that is truly dear to us! As a statistical health consultancy, it is our goal to actively contribute to promoting good quality of life and health in the future. It is our daily task to enable patients to lead a better life and employees to work under healthier working conditions within the company. It is our vision to shape a positive future worth living and to grow in a sustainable and profitable manner.

The close relationship to our customers, business partners and colleagues is based on respect and trust. Passion and a strong team spirit are our motivation to think outside of the box. This is how we perceive our work and regard it as the key success factor in our field.

Our daily activities are based on our company values respect, sustainability and performance. And we live by these values!


When we meet people, we always show them our deep respect. Integrity, honesty, trustworthiness and empathy are the basic requirements for respectful solidarity. Good relationships are based on clear communication. We would like to keep you in the loop at all times. We put great emphasis on transparency at each step of the process as well as when we present the results. Your trust is our greatest asset!


As a company, we are not only responsible for our customers, our workforce and our business partners, but also for the future generations. We are convinced that there is no alternative to a sustainable approach which is why we strive for meaningful and solid partnerships with our customers.


Performance and service are important to us and above all excellent quality! We work with diligence, clarity and flexibility in order to achieve optimal results. The foundation of our success is our customers’ satisfaction.



We not only focus on responsibility, we carry it out.

The concept of sustainability is deeply embedded in our company values and has been a part of Chrestos since its foundation. Our target is to establish a balance between social, economic and ecological needs in order to ensure a sustainable future.

The team

Passionate. Crazy. And simply stronger together.

Janina BuschmannManaging Director
Alexander PieperLate Development Statistics
Steffen JeskeHealth Technology Assessment
Dr. Boris WeimannManaging Director
Ricarda NorenbergChrestos Institute
Nina PapiesCorporate Health Management
Mohammad VossoughiLate Development Statistics
Dr. Maike AhrensBiomarker Statistics
Jessica HöggProgramming & Data Management
Nina BescheEarly Development Statistics
Adam SkubalaBiomarker Statistics
Dr. Sebastian VoßHead of Biomarker Statistics
Marc LambeletLate Development Statistics
Heike SteinbredeMedical Writing
Vitali GeringProgramming & Data Management
Robert KrauscheHead of Health Technology Assessment
Stephanie LöwenHead of Early Development Statistics
Dr. Jessica HirschHead of Chrestos Institute
Ana PiciuEDS Oncology
Gökhan ÖzcanHead of Programming & Data Management
Konstantin LangEarly Development Statistics
Britta BrockmannHealth Technology Assessment
Laura MarquisProgramming & Data Management
Heidi ManterHuman Resources
Claudia RahnerLate Development Statistics
Frieder WolffProgramming & Data Management
Dr. Michael BrockmannProgramming & Data Management
Dr. Sabrina SiebertHealth Technology Assessment
Christina CyrisHealth Technology Assessment
Regina UttenreutherEarly Development Statistics
Jessica AbramowskiProgramming & Data Management
Dr. Yvonne ButtkewitzLate Development Statistics
Simon LangerEarly Development Statistics - Head of Oncology
Julia HilbertHealth Technology Assessment
Berit GeisEarly Development Statistics
Frauke HennigChrestos Institut

We do what we do because we believe in supporting people’s health.

Please contact us, we would be delighted to give you some personal advice.