Gijs Dröge.


Director SMK

T: +31 (0)70 358 63 00

E: gdroge@smk.nl

Minke van Bentum.


Junior Project Manager Plant agri chains

Minke van Bentum has been working for SMK since July 2018. As junior project manager Plant agri-chains, she supports the department and contributes to the development of the certification schemes of On the way to PlanetProof and Groen Label Kas. 

Minke studied Tropical Agriculture at the University of Applied Sciences Van Hall Larenstein in Wageningen, with the specialisation Sustainable Value Chains. This study is focused on improving sustainability in supply chains, with attention for agricultural-, environmental- and social aspects. During her study, Minke has gained international experience  through several internships. For example, her bachelor thesis for a Dutch company on the Corporate Social Responsibility of their Thai producers.

After graduating, she has worked for a Dutch chrysanthemum breeder in Ethiopia. From this she gained experience in the cultivation of ornamentals and Integrated Pest Management.

E: mvanbentum@smk.nl

Jaap Bij de Vaate.


Project Manager Plant agri chains

E: jbijdevaate@smk.nl

Kim Boetekees.


Junior communication coordinator

Kim Boetekees joined SMK in April 2021. As a junior Communications Officer, she will be involved in the content production for the new SMK websites and the various quality marks.

Kim studied Communication at Hogeschool Leiden. She followed minors in PR and Writing and graduated with research into internal communication.

She has gained experience on the agency side as well as at a non-profit organization in the execution of marketing and communication strategies and in devising/developing content.

During her internship she worked for the Municipality of Leiden and Alrijne Zorggroep. Her expertise lies in writing and she likes to create content for social media.

E: kboetekees@smk.nl

Nannette Braun.



E: nbraun@smk.nl

Ellen Brussee.


Communication Advisor

Ellen Brussee is Communication Advisor at SMK since October 2019. She is involved in the corporate communication activities of SMK and communication of the environmental quality labels and certification schemes. 

Ellen studied Science of Communication at the University of Amsterdam. In Canada she followed a minor Marketing and graduated in Amsterdam with a Master of Science in Corporate Communication. She continued to develop and achieved certifications in Business and Online Marketing.  

She worked in profit and non-profit organizations on the development and execution of marketing and communication strategies for different (international) target groups. While working at agencies,  she worked for clients like HelloFresh, Qurrent, VandeBron, Rabobank and the municipality of Leiden. Her expertise lies in the area of social media.  


E: ebrussee@smk.nl

John Janssen.


Project manager Plant agri chains

John Janssen started working at SMK in August 2018. He is working as a project manager Plant agri chains on the national and international development of the ‘On the way to PlanetProof’ certification schemes for some horticultural branches, and on the criteria for processed products. He is also the contactperson for the Barometer Sustainable Florist.

John studied Horticulture at the Wageningen University and he specialised in a few agronomical directions. After graduation he worked as a horticultural advisor, agronomist, public relation manager and advisor for horticultural policy.

As an employee at some regional Dutch Agricultural production organisations and the Dutch Association of Arboriculturists (NBvB) and Tree Centre Opheusden, he became very familiar with sustainable production. He also took initiatives for developing sustainable growing systems in arboriculture and greenhouse cultures.

John is considering his employment for SMK as a unique opportunity to contribute to the development of horticultural production systems, in a way that the production of vegetables, fruits and ornamentals are more and more in balance with the environment: ‘On the way to PlanetProof’.

E: jjanssen@smk.nl

Stefanie de Kool.


Programme Manager Plant agri chains

Stefanie de Kool has been working for SMK as a Programme Manager Plant agri chains since January 2014. She is responsible for On the way to PlanetProof  Plant products, both in the Netherlands and internationally and the various associated projects.

Stefanie studied Agronomy at Wageningen University, graduated in 1996 with specializations in tropical agronomy, soil fertility and extension. She started working as a consultant in sustainable land use within a soil conservation project in Nicaragua, then as technical assistant at the International Agricultural Centre in the Netherlands, and later as agriculture adviser for the Uganda National Farmers Federation) in Uganda.

From 2001 to 2014 Stefanie worked at the Applied Plant Research (PPO) of Wageningen University and Research Centre (WUR); First as a researcher in sustainable farming systems and since 2003 as a senior project manager for the business unit Flower Bulbs, Tree Nursery and Fruits. She developed a broad expertise on improving the sustainability of farming systems and stakeholder processes.

T: +31 (0)70 358 63 00

E: sdekool@smk.nl

Tineke Kramer.


Project Manager animal supply chains

Tineke Kramer joined SMK in June 2019. As project manager of animal supply chains she is involved in animal products and stables through the criteria of the integral quality mark On the way to PlanetProof and Maatlat Duurzame Veehouderij.

Tineke is a veterinarian and European specialist veterinary public health (Dip. ECVPH). In recent years, her focus has been on One Health and risk management of zoonoses. This in collaboration with human doctors, policy officers and livestock farmers, among others. She worked on One Health at the Faculties of Veterinary Medicine in Utrecht and Gainesville Florida, the regional public health service (GGD), Inholland University of Applied Sciences, the National Institute for Public Health and the Environment (RIVM) and the World Health Organization in Geneva. One Health focuses on balancing the health of people, animals and the environment and is therefore in line with SMK's objectives to stimulate integral sustainability.

E: tkramer@smk.nl

Herman Docters van Leeuwen.


Programme Manager agri chains

Herman Docters van Leeuwen has been working for SMK since 1999. As a Programme Manager agri chains, he is responsible for On the way to PlanetProof livestock sectors (beef cattle and dairy), the Barometer Duurzame Bakkerij & Zoetwaren (Barometer for Sustainable Bakery & Confectionery), the Barometer Duurzaam Terreinbeheer (Barometer Sustainable Management of public areas). He is also involved in the development and management of the Maatlat Duurzame Veehouderij (Sustainability standard for animal production). Previously he developed the certification scheme Groen Label Kas. Moreover, he advises governments and companies on sustainability.

Herman studied biology in Leiden and completed the study Dutch agriculture at the Agricultural University of Applied Sciences in Delft in 1992, with as major Animal production. After graduating, he took on a commercial role at the plant nursery Hoveling Plant. After this he worked as policy officer for the gardening department of the municipality of Apeldoorn, and as teacher in higher agricultural education, for the studies rural development and animal production.

In the past years, Herman has been involved with the development and implementation of agricultural nature conservation as a secretary for the agricultural nature association Vockestaert in Midden-Delfland. Moreover, he is a rider at the Jockeyclub of the Rotterdamsche Manège. He was active at this club as a board member for four years. Since 2013, he is a member of the sustainability workgroup of the Laurens Church in Rotterdam.

T: +31 (0)70 358 63 00 

E: hdoctersvanleeuwen@smk.nl

Els Lindeboom.


Project manager Plant agri chains


E: elindeboom@smk.nl

Wendy Overduin-Freese.


Financial Administrative assistant

E: woverduin@smk.nl

Monique van Raam.



E: mvanraam@smk.nl

Annika de Ridder.


Project Manager animal supply chains

Annika de Ridder has been working at SMK since 1 May 2013. As the Project Manager animal supply chains, she is responsible for the On the way to PlanetProof criteria for the livestock sectors and processed products, and is intensively involved in the development and management of Maatlat Duurzame Veehouderij (Sustainability index for animal production and Aquaculture). 

Annika completed the Bachelor degree programme in Dier- en Veehouderij (Animal and Livestock Farming) at the INHOLLAND University of Applied Sciences in Delft. She then gained a Master's degree in Biology in Leiden, specialising in Evolutionary and Ecological Sciences.

In 2009, she worked as an inspector of subsidies for agricultural nature conservation at the General Inspection Service (Algemene Inspectiedienst, AID, now part of the Netherlands Food and Consumer Product Safety Authority, NVWA). In that role, she visited a large number of agricultural firms.

From 2010, she was an implementation expert at the former Implementation Service for the Ministry of Agriculture, now part of the Netherlands Enterprise Agency (RVO), dealing with applications for project grants for the agricultural sector, for instance for innovation projects and the investment scheme IDSH (Integraal Duurzame Stal- en Houderijsystemen, integrated sustainable animal housing and husbandry systems).

In 2011, she gained the certificate Bedrijf en Kwaliteit (Company and Quality, integrated quality assurance) at HAS Kennis Transfer in Den Bosch.

T: +31 (0)70 358 63 00

E: aderidder@smk.nl

Bernd Slesazeck.


Extern Project manager and secretary TPAC

Bernd Slesazeck works on a project basis as secretary TPAC (Toetsingscommissie Inkoop Hout). He is responsible for the reassesments of PEFC and Keurhout as part of the Dutch Procurement Policy. 

Bernd studied Forest-and Nature Management at the University of Wageningen and succeeded his degree in 2008 specialised in ecology and management, and in developmentsociology. In 2008, he worked at SMK as projectmember to support TPAC. From 2010 he works as certifier and auditor for Forestmanagement and timber-and paperchains. Bernd is independent entrepreneur since 2013 and involved in audits for FSC and PEFC as well as audits for biomass (SBP, GGL). 

E: bslesazeck@smk.nl

Lien Terryn.


Project manager Plant agri chains

In May 2019, Lien Terryn has joined the SMK team. In her role as project manager Plant agri chains she contributes to the content-related requirements of On the way to PlanetProof and she has contact with producers, advisers and researchers.

Lien graduated on the Catholic University of Leuven as Bio-engineer soil science and water management.  Her first working experience was in Vietnam. During her 2-year stay in Hanoi, Lien facilitated the transition to more nutritious forages used by small-scale dairy farmers.

The last 9 years, she worked as a consultant and project manager at CLM Research and Advice Ltd. In this position she managed projects for among others SAI Platform, Heineken, PepsiCo and Ben & Jerry’s.

E: lterryn@smk.nl

Wim Uljee.


Communication Manager

Wim Uljee is Communication Manager at SMK since September 2006. He is responsible for the corporate communication of SMK and communications of the environmental quality labels and certification schemes.

He is involved in the planning and productions of publication materials for the media, websites, social media and annual reports. Also, he gives ‘acte de présence’ to events and manages relationships with core stakeholders to ensure corporate messages are in line with the corporate guidelines and identity.

Wim has spent more than 25 years as account, project – and media manager with different advertising agencies within the Netherlands. During this time he has gained all-round experience, including working for diverse branch associations, such as FOCWA, Stichting BouwGarant, VNP Koninklijke Vereniging van Nederlandse Papier- en kartonfabrieken (Federation of Dutch Paper- and cardboard factories).

E: wuljee@smk.nl

Ineke Vlot.


Programme Manager non-food

Ineke Vlot has worked at SMK as Programme Manager non-food of various non-food programmes since 1996. For EU Ecolabel, she assesses application files for certification. From her role within SMK, she represents the Dutch Ministry of Infrastructure and Water Management in the Regulatory Committee of EU Ecolabel, and advises this Ministry about new and revised EU Ecolabel criteria with regard to voting positions within the European Union Ecolabelling Board (EUEB). Since 2020 Ineke is President of the EUEB. She has been the vice president of the EUEU since April 2015.

Ineke is also responsible for the development and management of the Milieukeur non-food certification schemes.

In addition, she is involved in Sustainable Purchasing/Green Public Procurement for various product groups, both nationally and internationally.

Ineke is also a board member of the Association of Certification Scheme Developers, founded end of 2018.

Ineke studied biology and environmental sciences at Leiden University. During her studies, she performed research on topics including environmentally-relevant product information for consumers, modelled on the German ‘Blaue Engel’ (Blue Angel) certification programme.

After graduation, Ineke worked for a lengthy period as a project leader at the Centrum voor Energiebesparing (CE Delft; centre for energy savings). Her responsibilities included the feasibility study for Milieukeur (examining the possibility and desirability of setting up a Dutch eco-label) and research into international product-focused environmental policy. Before that, she was a project leader at the Stichting Consument en Veiligheid (consumer and safety foundation) and a product researcher at the Keurmerkinstituut (Certification Institute).

T: +31 (0)70 358 63 00 

E: ivlot@smk.nl

Robert Jan Volders.


Project Manager non-food

E: rvolders@smk.nl

Erwin de Vries.



E: edevries@smk.nl

Saskia van Wageningen-Lucardie.


Project employee animal agro chains

E: slucardie@smk.nl

Lars Woltmann.


Project Manager EU Ecolabel

E: lwoltmann@smk.nl