
Welcome, my name is
Theo van der Sluijs
Manager Building Sustainability | Technical Strategic Thinker | Sustainability Advisor
With a background in software development and product management, I combine innovation with sustainability. At Zeeuwind, I lead sustainability projects for homes and SMEs, coordinate neighborhood-based approaches, and research innovative solutions such as home batteries and mini heat networks. I describe myself as a bridge builder between technology, strategy, and societal impact.
Professional Career
From software development to sustainability - a journey of more than 25 years
Manager Building Sustainability
SustainabilityAt Zeeuwind, I lead the sustainability efforts for homes and SME businesses. I develop and coordinate neighborhood-based approaches and sustainability projects, collaborate with municipalities and external parties, and ensure a future-proof digital platform for homeowners and energy coaches. Additionally, I research and implement innovative solutions such as home batteries, EMS, and mini heat networks. My work revolves around collaboration and practical solutions, making sustainability achievable and accessible for everyone.
Senior Product Owner
As Product Owner at Maxxton, I lead a team of 18 backend and frontend developers, designers, and QA professionals in India. I regularly visit India and maintain daily contact to ensure smooth communication and efficient workflows. I collaborate with clients such as Roompot, Landal, and Farmcamps, providing tailored solutions. My focus is on developing secure, well-tested financial modules that streamline operations and enhance user experience.
Owner
Owner
TS Intermedia
As owner of TS Intermedia since 1996, I bring extensive IT and development experience in interim roles at Product Owner/Manager, Team/Tech Lead, Manager, and CTO levels. My expertise spans software development, hardware configuration, and network environments. I excel at leading large international teams and delivering secure, reliable, and efficient solutions. I help companies optimize their IT infrastructure and processes, ensuring robust solutions and security across all aspects of their IT operations.
Product Owner
At Pay, I was Product Manager/Product Owner, leading a team of 8 developers. My role involved creating robust and secure payment processing software. With skills in analytical thinking, business analysis, agile methodologies, and project planning, I ensured our solutions met high standards. I collaborated with major banks and organizations such as iDeal, IN3, and ING to deliver reliable and secure payment systems.
Project Manager/Operational Lead
As Project Manager/Operational Lead at XSARUS, I led a team of 8 developers to build secure webshops for major fashion brands like Bomont and Nora. Specializing in Magento e-commerce, I fostered collaboration, innovation, and agile methodologies to deliver robust online shopping experiences. I ensured projects met deadlines, budgets, and quality expectations while maintaining clear client communication.
CTO/IT Development Manager
At Viterra/Glencore, I served as acting CTO and IT Development Manager, leading 150 developers in India and 50 in the Netherlands, including Product Owners and testers. With help from Cognizant, we migrated critical software from PowerBuilder to Java/C# and Angular, delivering robust and efficient solutions. My role included strategic planning, resource allocation, and fostering a culture of innovation and continuous improvement.
CTO/IT Manager
As CTO/IT and Software Development Manager at eHealth Ventures Group, I advanced the company by defining the technological roadmap, driving innovation, and overseeing software development teams in the Netherlands and Curacao. My efforts ensured the delivery of high-quality e-health solutions, enabling consumers to make informed decisions.
CTO/Head Tech
As CTO at Bax-Music, a company aiming to become Europe's largest eCommerce music store, I played a crucial role in its growth. Under my leadership, our development team grew from 3 to 35 professionals. We migrated from a monolithic system to a microservice-based environment, improving scalability and performance. My strategic vision and focus on innovation were recognized by industry peers such as Coolblue. At Bax-Music, I emphasized agile methodologies, continuous improvement, and collaboration, leading to significant contributions to our success as a leading European eCommerce music store.
Various (consultancy) roles
Various
- IT Adviesgroep: VB/ASP Classic Developer
- Zeelandnet: VB Developer / Team Lead
- Resulstants-e: Lotus Notes Developer
- Mulix ICT: PHP Developer
- NL4Business: SAP/ABAP Developer
- Univer: PHP Developer / Manager
Education & Certifications
The Hague University/TH Rijswijk
VIA, Design and Development of Interaction
1996 - 2001
MEAO Oude Tonge
Computer Science & Business Administration
1991 - 1996
Willem van Oranje
MAVO (Secondary Education)
1987 - 1991
Professional Certificates
SME Energy Coach Certificate
Duurzaam Bouwloket Energy Coach
Professional Scrum Master I (PSM I)
Professional Scrum Product Owner I (PSPO I)
Professional Scrum Product Owner II (PSPO II)
NUCLEAR01x: Understanding Nuclear Energy
Senior Executive Management
Volunteer Work
Member / Website Administrator
Lokale Partij Borsele
2024 - present
Chairman
Werkgroep Duurzaam Nisse
2022 - present
Board Member
Boekenmarkt Nisse
2022 - present
Chairman
Stichting dorpsraad Nisse
2020 - 2026
Founder / Chairman
Samenwerkende Dorpsraden Borsele
2022 - 2023
(Interim) Chairman
Rommelmarkt Nisse (140 volunteers)
2022 - 2023
Skills & Expertise
Technical
Professional
Languages
Get In Touch
Interested in collaboration or just a conversation about sustainability and technology?