Arcturus: Our People

A strong team together!

Introduce

Arcturus is a young actuarial consultancy firm with highly qualified, highly experienced actuaries and enthusiastic young talents. The employees are all passionate actuaries and data scientists, who enjoy working together and with their customers. There is room for personal initiative and development, and together we form a strong team that accelerates in busy times and difficult deadlines.
rachel bonsel

Rachel Bonsel

+31 6 3043 0350

rachel.bonsel@arcturus.nl

Has extensive specialistic knowledge of Solvency II, such as for estimating reserve risk for non-life insurance. Experienced in the implementation of reporting tools for QRTs. Did her thesis research on a partial internal model for disability insurance. Enthusiastic, eager to learn and solution-oriented. Excellent analytical thinker.

 

“Solving complex problems in such a way that the customer can continue, that is my passion”

michiel van dellen

Michiel van Dellen

+31 6 1019 8714

michiel.vandellen@arcturus.nl

Partner at Arcturus with a main focus on Actuarial Function activities for various clients. A highly experienced professional with 22 years of experience in the insurance industry. Has in-depth knowledge in the field of non-life insurance and reinsurance. Previously worked as supervisor of medium-sized insurers at the Dutch Central Bank (DNB) and as manager Finance and Risk at a reinsurer.

Michiel is analytical, communicative skills at different levels and solution-oriented.

“Based on our analysis, my goal is to come up with usable solutions for the customer as much as possible”

Melchior Mattens

Melchior Mattens

+31 6 3711 9707

melchior.mattens@arcturus.nl

Actuary with extensive experience and knowledge of Solvency II and risk modeling. Always looking for innovative ideas and insights that lead to more adequate risk management. Has a great affinity with pricing, catastrophe modeling and reinsurance. Always ready for customers and colleagues. Winner of the Johan de Witt thesis prize in 2017 and was named Actuarial Talent of the year in 2018.

 

“Kites rise highest when they go into the wind: with a healthy critical eye, the customer receives the best advice”

patrick dannenburg

Patrick Dannenburg

+31 6 2354 6181

patrick.dannenburg@arcturus.nl

Partner at Arcturus, with a focus on the Actuarial Function. Has in-depth knowledge in the field of non-life and income insurance and is an easy discussion partner for every level within your organization. A highly experienced actuary, with over 20 years of experience in the insurance industry. Previously worked as an actuarial function holder at a medium-sized insurance company, as a senior manager at a large consultancy/accounting firm and as a supervisor at De Nederlandsche Bank.

His strengths: involved, connecting, guiding and achieving goals effectively.

 

“Based on my broad background, I am passionate about the ‘financial health’ of organizations, while not losing sight of the human side.”

Founder of Arcturus. Has extensive knowledge and experience in SII, financial risk management and actuarial topics. Has experience in managing actuarial and interdisciplinary teams. She is known for her broad and in-depth knowledge and her critical attitude, in addition to her flexibility and advisory skills. Her enthusiasm and drive, she motivates both her team and her clients. She is Actuarial Function Holder for several non-life insurers in the Netherlands. Her strong points are delivering high quality work, challenging existing methods and developing alternatives.

 

“My customers always come first”

peter van kampen

Partner at Arcturus. In-depth knowledge in the field of non-life and income insurance.

Large experience in managing teams. Easily switches between levels within an organization.

 

“My ambition and motivation is to translate technically complicated matters into practical applications and efficient solutions for the customer”

marco van der lans

Marco van der Lans

marco.vanderlans@arcturus.nl

Marco is an experienced actuary who has been employed by Arcturus since November 2021. Before joining the company, he worked in consultancy and as an actuarial manager for a large insurance company. He therefore has experience with a wide variety of topics including model development, model validation, LAC DT, IFRS 17, and due diligence work.

Marco loves challenges and is always looking for a way to perform work more efficiently and better. In addition, he likes to focus on the translation of complex actuarial matters into management and control information. In short; he is your sparring partner for all your issues.

 

“I like to make your problem my challenge”

Angela-van-Heerwaarden

Angela van Heerwaarden

angela.vanheerwaarden@arcturus.nl

Actuarial manager at Arcturus since 2018, combined with teaching at the University of Amsterdam. Angela is highly experienced in pricing, reserving, capital and reinsurance. Develops and provides training programs at different levels, and is able to upgrade model validations from burden into effective improvement programs.

She loves a deep dive into tricky problems, is a helpful discussion partner and can help others progress through coaching and training.

 

“Risks are my passion, especially looking for ways to manage them”

Bernd is an all-round actuary. Carried out SCR reports and ORSA calculations for various non-life insurers and done a lot of development of models for non-life insurers at Arcturus. In addition, extensive actuarial knowledge of life insurance, especially in the field of actuarial certification, assumption studies and documentation of internal models.

 

“I like to deliver good quality products”

Many years of experience in non-life insurance and is far from tired of this. Studied Econometrics and Actuarial Sciences and completed the education for Actuary AG at the Actuarial Institute.

Is energetic, socially engaged and very disciplined. Loves to dig into complex issues and to translate content into practice.

 

“Non-life insurance is so diverse, it continues to fascinate me”

Constance van Noort

Constance van Noort

constance.vannoort@arcturus.nl

Senior actuary at Arcturus since 2017. Constance has over 20 years of experience in the pension sector and more than 15 years in the insurance sector. The focus is on advising pension funds and pension administration organisations, reporting, accounting, supervision, audit and risk management.

Constance is socially involved and has insight into all stakeholders. Openness and honesty are of paramount importance to her.

 

“My clients all indicate that I am customer-oriented and very involved”

Working at Arcturus since 2024. With a broad background in consultancy, the financial sector and as an entrepreneur, he brings a unique combination of insights and experience. Thanks to his knowledge of data science, actuarial issues and operational management, combined with various training courses in Econometrics and Law, he can analyze complex problems from different angles and tackle them in a solution-oriented manner.

His social and analytical skills make him an accessible and valuable discussion partner at every level within your organization. He also feels a strong responsibility for every assignment: only when everyone is satisfied does he consider the work successful. His approach is positive and focused on cooperation, always striving for the best result for the customer.

 

“With the right mindset, anything is possible”

Freek van den Honert

freek.vandenhonert@arcturus.nl

After completing his studies in Econometrics at the University of Amsterdam, he has been working at Arcturus since 2019. Mainly engaged in data-driven analysis, forecasting models and simulations. But he also enjoys doing tool development.

 

“KISS gets done a lot faster”

Isa Widdershoven

Since 2022, Isa has been working at Arcturus. In the same year, she also completed her studies in Econometrics and Operations Research in Maastricht. Eager to learn, she is further developing herself by pursuing the Actuary AG qualification at the Actuarial Institute. Her role at Arcturus provides an opportunity to apply and expand the knowledge and skills she gained during her studies in a practical setting.

Isa is enthusiastic, friendly, and a quick worker. She does not shy away from a challenge and works on a variety of projects every day. At Arcturus, she enthusiastically leverages her skills to contribute to the success of the team and our clients.

 

“I don’t shy away from a challenge”

Working at Arcturus since 2021. Kalyani has a background in Economics and pursuing ASA pathway with Society of Actuaries. Mainly involved with SCR Tool development and building user-friendly interactive apps for validation and pricing analysis.

Kalyani is result-oriented, analytical and loves to learn and work with new challenging topics.

 

“My goal is to provide productive, high-quality solution: Linking data analysis to optimal solution in interactive client-friendly manner”

Started at Arcturus in December 2022 as a Senior Actuary and in that role he is actively involved in performing first-line as well as second-line actuarial work for various clients. He is an experienced professional with in-depth knowledge in the field of non-life insurance. Previously Kees worked as a manager at a large consultancy/accounting firm and he performed first-line as well as second-line actuarial work for medium-sized insurance companies.

His strengths: customer-oriented, enthusiastic and result-oriented.

“We will work together to find a suitable solution for your problem”

Extensive experience in the actuary field. Mainly life insurance, but also income, pension and non-life. Worked in the context of actuarial certification, Solvency II, model validation, embedded value, IFRS and Wabeke. Also knowledge of projection models in AFM and Moses. Preference for the technical side of the profession based on a solid approach.

 

“I like to deliver good and thorough work”

Senior actuary at Arcturus since 2017. Mark is responsible for various Solvency II reports. He is also involved in the further development of Arcturus tools and is employable for various ad hoc assignments as well. He has many years of experience as a non-life actuary, both pricing and reporting, in particular for P&C insurance, sickness leave insurance and disability insurance.

Mark is skilled in quantitative analysis and has a great sense of responsibility for meeting deadlines.

 

“I like to help our customers in analysing their data and in optimally using these data for better business results”

Very experienced actuary in the field of Life Insurance, Risk and Reporting and Model Validation. For Arcturus he is skilled in producing periodic SII reports of the Best Estimate technical provisions, SCR and ORSA for medium-sized non-life insurers.

Previously worked as a Solvency II reporting actuary, financial risk manager and model validator at the group actuarial department of a large insurer and was involved with the regulator in the assessment of the internal models of the major insurers in the Netherlands. His strengths: accuracy and formulating substantiated judgments.

 

“There is a suitable solution to every problem”

After completing his Master in Econometrics and Operation Research at the VU, Reinier started as a junior actuary at Arcturus in 2024. With a background in Computing Science and Mathematics, Reinier enjoys data-driven analysis, predictive models and simulations.

Reinier is enthusiastic, eager to learn and enjoys broadening his knowledge in the actuarial world.

 

“Quality is in the details, solutions are created through insight and perseverance”

Junior actuary at Arcturus since 2022. She has an academic background in Applied Mathematics and later pursued Actuarial Science, completing her studies with a thesis on cyber risk.

Romy is extensively involved in tool development and is our specialist in flood risk. She is also interested in sustainability and deepens her knowledge in this area to further enhance the support we provide to our clients. Romy is eager to learn and a go-getter.

 

“I see change as an opportunity to innovate”

Employed at Arcturus since early 2021. In the following summer, he was able to complete his study Actuarial Sciences at the University of Amsterdam. Motivated to put the acquired knowledge into practice.

 

“Using modern tools, we can continue to create beautiful products for our customers.”

siebren atsma

After completing his studies in “Econometrics and Operations Research” and “Quantitative Finance and Actuarial Science” at Tilburg University, Stephan has been working at Arcturus since 2024. He enjoys working with data (visualization) and developing models. He also enjoys doing diverse work in order to continue to gain and learn new knowledge and skills. This makes Stephan the perfect fit as a junior actuary at Arcturus.

 

“With the help of the motto ‘divida et impera’ every problem can be solved”

siebren atsma

Timo van der Poel

timo.vanderpoel@arcturus.nl

Meet one of our quantitative talents: Timo. After completing his studies in mathematics and business administration at the University of Amsterdam, he has been working at Arcturus since 2023. He has experience in developing software, but also has a lot of knowledge of statistical modeling. He mainly focuses on pricing activities and simulation models for climate risks and reinsurance.

Timo is enthusiastic, customer-oriented and analytically strong.

 

“With creativity and effective analysis we can face challenges together”

Actuary at Arcturus since 2020. Tom is a professional result driven non-life actuary with 3 years of experience in non-life insurance consultancy. He has short lines of communication with his clients and helps them turn Solvency II into added value.

 

“Call me if you are stuck in an analytical maze, I will gladly help you getting out of it!”

Office Manager

Financial worker

Ronald Castenmiller

Management support

Frank van Grondelle

frank.vangrondelle@arcturus.nl

Job opportunities

werving@arcturus.nl

We are looking for an enthusiastic actuary to strengthen our team and to further develop our services.

To know more, check out our Job opportunities page!

 

“Are you the perfect addition to our team”

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