SDIM digital marketing agency, where creativity and data come together to deliver the best results
Based in Haarlem (near Amsterdam), SDIM has been making top-level digital marketing accessible to all organizations since 2006. We offer full-service solutions, from strategy to execution, across Europe and beyond. Whether it’s B2C, B2B, startups, scale-ups, multinationals, or SMEs, we take a no-nonsense approach: our advice is always well-supported and explained in clear language, with a focused and data-driven methodology. This is all made possible by a talented team of ambitious specialists with a clear vision for the future of digital marketing. Whatever the challenge for your organization, SDIM makes it happen.
Our
TEAM
At SDIM, we have an experienced team of digital marketers. All disciplines are represented at various levels of expertise. Whether it’s an all-round advertising specialist or a technical SEO expert, we cover all areas and you work directly with the best specialists through short lines of communication. If necessary, we also have a large network of trusted freelancers to quickly bring in additional capacity, specialized knowledge, or operational support. In addition to consultancy and operations, temporary secondments are also an option.
We Achieve
digital succes
Vision
Digital marketing is always evolving. This impacts the way we work, the number of disciplines involved, and the role we play for our clients. Digital marketing agencies have shifted from being service providers to strategic partners. As a result, the range of services has expanded, and working methods have changed due to technological advancements. Tasks we performed five years ago are no longer done today, and tasks we do now will likely be obsolete in five years. This requires flexibility and adaptability. Because SDIM is a flat organization, we can always stay ahead of these developments. At the same time, we don’t get swept up in buzzwords and trends. We test everything carefully and only move forward when we see measurable improvements. This ensures the quality remains intact. Our vision of what the level of digital marketing services should be remains unchanged, regardless of the discipline. This allows us to operate at the highest level and stay true to our mission and philosophy, which are essentially timeless.
Mission
SDIM’s goal is to make top-level digital marketing accessible and affordable for all organizations and businesses. Through thorough market research and continuous testing or development of new opportunities and tools, SDIM is able to create a high-quality standard product, allowing us to offer complex digital marketing solutions quickly and efficiently, alongside customized projects.
Philosophy
Sustainable partnerships with our clients are SDIM’s top priority. A strong, long-term client relationship is crucial. The client is at the center, but our employees are just as important. The quality of our team determines the quality of our work, and thus our success. Job satisfaction is one of our key KPIs, and it largely stems from our focus on quality. Expertise may be an old-fashioned term, but it perfectly aligns with what we stand for. We are highly results-driven, and we set a high bar for knowledge and service. We train our people ourselves and foster a culture that encourages critical thinking, curiosity, and innovation. By giving a lot of trust, we can offer our team considerable freedom. Integrity, independence, and autonomy are almost a given in our daily work. This not only benefits job satisfaction but also the results, and ultimately, the continuity of the business.
Our core values
Fun
Job satisfaction is our top priority. Why? Because enjoying your work leads to a huge boost in motivation, inspiration, and dedication. And that results in the best outcomes for our clients. A satisfied client means a satisfied employee, and vice versa. The joy, by the way, doesn’t just come from the many fun team activities or our famous company culture, but much more from the daily challenges people find in their work. It’s about taking a step forward every day and learning something new. Those who stop learning quickly lose their drive. Fortunately, that’s never the case with us.
Continuity
Everything revolves around continuity. Whether it’s our collaboration with clients, the partners we work with, or our team, the long term always takes precedence over the short term. That’s why we always invest extra time (and money) in starting new partnerships, training new people, and of course, retaining them. Everything in our business processes and methods is designed to ensure successful long-term collaboration. This allows us to remain future-proof and more easily invest in and anticipate what lies ahead.
Quality
The work we deliver defines our reputation. Over the years, we have carefully built this reputation, with one thing at the core: we want to deliver quality. That’s what we want to be known for. Whether it’s the expertise we have, the solutions we provide for complex issues, the advice we offer on strategic matters, or the service we deliver, we are only satisfied when we can do this at the highest level of quality. It’s not always easy, and things don’t always go perfectly. But you can only improve if you’re willing to make mistakes, as long as you learn from them.
Trust
In a world driven by data and measurability, it can be tempting to approach things from a control mindset. The more we know in numbers, the more we tend to want to steer based on those figures. At SDIM, we focus on trust and offer as much freedom as possible for individuals to shape their own work. Freedom also comes with responsibility, and that’s exactly what we want to instill in our people. Ownership is essential for growth and development. Making mistakes is part of that process and almost a necessity. This can only happen in an environment of trust, where openness and transparency allow everyone to truly be themselves. That’s what we stand for.
our history
Founded in 2006 around the kitchen table, SDIM has since grown into one of the largest independent digital marketing agencies in the Netherlands. In 2018, a management buyout took place, with the majority of shares sold internally by founder Jan Dirkzwager. From that point, Tijmen van Duijvenvoorde and Pieter Borst took over. In 2024, they acquired the remaining shares. Meanwhile, an increasing number of employees became partners through a shareholders’ foundation. SDIM’s core initially focused on search engine marketing, later expanding into (digital) performance marketing. This was followed by a natural progression into a full-service digital marketing agency, including the addition of a creative department and expansion into strategic consultancy. At the end of 2024, SDIM moved from its iconic building at Kleine Houtweg 109 (see photo) to the other side of the park, at Dreef 40.