Serge De Klerk

Head of Marketing - Digital Marketing | E-commerce l Demand generation | Martech | Marketing Automation | Branding | Data | Scaling Up | AI | Revenue πŸš€

The Randstad, Netherlands

About

πŸš€ Growth-Driven Marketing Leader | B2B & B2C | SaaS | Travel | E-Commerce | Demand Generation | Director I am an innovative, creative, and ambitious marketing leader with 20+ years of experience in both B2B and B2C marketing, e-commerce, and digital growth strategies. With a strong track record in scaling businesses, leading high-performing teams, and delivering measurable results, I thrive in highly competitive industries such as travel, SaaS, telecom, and finance. πŸ’‘ Strategic & Hands-On – Whether it’s building and scaling demand generation engines, optimizing marketing automation, or leading multimillion-dollar marketing budgets (+€40M annually), I combine strategic vision with a hands-on approach to execution. πŸ”₯ Proven Impact & Results: βœ” +2000% SQL Growth & Acquisition Success – Spearheaded hypergrowth at Connexys, contributing to its successful acquisition by Bullhorn. βœ” 4000%+ Increase in Marketing-Driven Revenue – Built and led a high-impact marketing team at Connexys/Bullhorn to drive exponential pipeline growth. βœ” Brand Building & Go-to-Market Leadership – Played a key role in launching and establishing brands such as Robin Mobile (now Budget Mobiel) in the Dutch market. βœ” Cross-Industry Experience – Scaled SaaS & PaaS marketing for software companies before returning to my home sweet home at Sunweb Group, bringing deep expertise in both B2C and B2B marketing. πŸ“Š Marketing Expertise & Specialties: Demand Generation & Growth Marketing – Lead & pipeline acceleration through data-driven marketing strategies. Marketing Automation & CRM – Expert in HubSpot, Salesforce, ActiveCampaign, and other automation tools. Performance Marketing & Conversion Optimization – Mastering SEA, SEO, retargeting, social advertising, and CRO to maximize revenue impact. Content & Brand Strategy – Driving engagement through storytelling, inbound marketing, and digital brand positioning. E-Commerce & Digital Transformation – Scaling online businesses and enhancing UX through insights-driven innovation. πŸ›  Some of my favorite tools: HubSpot, Salesforce CRM, ActiveCampaign, Hotjar, Google Analytics, Google Ads, WordPress, Databox, Power BI, Ahrefs, Screaming Frog, Drift, Intercom, Trello, Wrike, LinkedIn Ads, Canva. I thrive in dynamic environments where growth, innovation, and customer-centric marketing drive success. Let’s connect and talk marketing, leadership, and digital growth.

Experience

  • Head of Marketing at Pro4all
    Nov 2025 - Present Β· 9 mos

    Head of Marketing at Pro4all. I build brand-led growth in B2B SaaS by pairing sharp positioning and product marketing with demand generation that compounds. I bring a B2C backbone in digital performance (CRO, paid, lifecycle/CRM, experimentation) with B2B rigor in revenue accountability and measurement. We drive a clear narrative and stay top-of-mind. Enabling the team to identify and activate category entry points - so sales meets ready buyers, not just more form fills. Equally important: building and coaching a collaborative, high-performing team: clear goals, shared rituals, data drivenβ€”on a path to become the best B2B marketing team in the market. We work hard, ship often, and have fun doing it. We build this together.

  • Sunweb Group (Full-time Β· 3 yrs 7 mos)
    • Head of Ecommerce Sun & Beach
      Nov 2021 - May 2025 Β· 3 yrs 7 mos

      As Head of E-commerce Sun & Beach at Sunweb Group, I lead the digital growth and optimization of the full customer journey across all marketing and e-commerce channels. Managing a team of marketing specialists, I develop and execute strategies that enhance customer acquisition, engagement, and retention while ensuring commercial impact and efficiency. My role encompasses overseeing performance marketing, SEO, CRM, social media advertising, affiliate marketing, and offline media, continuously optimizing the media mix to drive ROI and revenue growth. By collaborating cross-functionally with product, commercial intelligence, and market leads, I ensure integrated campaigns that align with Sunweb Group’s business objectives. A key part of my role is driving innovationβ€”staying ahead of digital trends, refining our channel strategy, and leveraging data-driven insights to maximize impact. I also manage budgets for all digital and offline channels, ensuring effective allocation and optimization. Through strong leadership, I build and motivate high-performing teams, fostering a results-driven and collaborative environment. My focus is not just on campaign execution but also on building long-term capabilities that empower the team and contribute to Sunweb Group’s success.

    • Head Of Ecommerce at Eliza was here
      Nov 2021 - Jul 2023 Β· 1 yr 9 mos

  • Head of Marketing at 4SUITES
    Jul 2020 - Nov 2021 Β· 1 yr 5 mos

    πŸš€ Driving Growth Through Brand, Demand, and Automation As Head of Marketing at 4SUITES, I was responsible for leading all marketing efforts, focusing on brand positioning, demand generation, and increasing marketing’s revenue contribution. Beyond strategy, I took a hands-on approach, personally building and optimizing marketing automation flows in HubSpot to drive lead nurturing and conversion. βœ” Brand Strategy & Positioning – Established 4SUITES as the go-to solution for smart hotel access. βœ” Demand Generation & Growth Marketing – Built a scalable lead-generation engine that significantly increased SQLs and marketing-driven revenue. βœ” Marketing Automation & HubSpot Expertise – Designed and implemented automation workflows to optimize lead nurturing and customer journeys. βœ” Data-Driven Marketing – Leveraged analytics and insights to refine campaigns and maximize ROI. About 4SUITES: 4SUITES opens the door to a smarter hotel. Streamline your hotel operation and optimise the guest experience through our intelligent access technology. Absolutely seamless for guests - Fully automated for hotels - COVID-19 ready and secure.

  • Head Of Corporate Marketing at Sana Commerce
    Apr 2019 - Apr 2020 Β· 1 yr 1 mo

    Responsible for all corporate marketing for Sana Commerce and leading a great team of B2B SaaS marketing experts. In this role I was Head of Marketing for the teams Content Marketing, Digital Marketing, Customer Marketing, Product Marketing and Event Marketing. 16 FTE in total. About Sana Commerce: Sana Commerce helps businesses all over the world reach their full potential. We offer the shortcut to e-commerce. How? Through 100% seamless integration with SAP and Microsoft Dynamics. Our e-commerce solution leverages existing business logic and data in powerful and user-friendly web stores. This lets our clients focus on improving customer experience, streamlining sales processes, and increasing sales volume and frequency. Sana Commerce is a certified partner of Microsoft Dynamics and SAP. Our innovative approach and strong partner network make Sana the driving force behind over 1,200 web stores worldwide. Because of our experience and expertise, we can go all the way, offering not only a product but also supporting services such as online marketing, Search Engine Optimization (SEO) advice, hosting, design and online payment providers.

  • Global Marketing Manager (interim) at Intelligence Group
    Nov 2018 - Apr 2019 Β· 6 mos

    πŸš€ Scaling Marketing for Growth & Revenue Acceleration Brought in to elevate Intelligence Group’s marketing operations and drive measurable revenue growth. My focus was on: βœ” Demand Generation & Revenue Growth – Implemented a high-impact marketing strategy to scale MRR and ARR for the SaaS product. βœ” Marketing Automation & Lead Conversion – Optimized automation workflows to enhance cross-sell and upsell opportunities. βœ” Multi-Channel Strategy – Leveraged a mix of digital channels to maximize reach and engagement. πŸ“ˆ Results: Increased SQLs and marketing-driven revenue by 300% within 6 months.