Chief Operating Officer (COO)
Vacancy
Chief Operating Officer (COO)
Join GSES as Senior Chief Operating Officer (COO)
In this role, you will take ownership of day-to-day operations while building the systems and structures required for long-term growth. You will connect strategy to execution, manage cross-functional coordination, and support product rollout and investor readiness. As a key member of the leadership team, you will help position GSES as a global standard in sustainability scoring.
About GSES
GSES, Global Sustainable Enterprise System, develops advanced systems that transform complex sustainability and ESG data into clear, reliable, and comparable insights. We are building the global standard for transparent sustainability scoring and digital infrastructure that enables better, data-driven decision making worldwide. Our technology supports governments, organizations, and international projects, including EU-funded initiatives, in creating a more transparent and resilient global economy.
Your Role as Chief Operating Officer (COO)
As Chief Operating Officer, you will be the driving force behind turning strategy into structured, scalable execution. You will build and optimize the operational backbone of GSES, oversee daily operations, and ensure tight alignment between product development, partnerships, and growth. Working closely with the Founder and leadership team, you will play a defining role in shaping GSES’s next phase of international expansion.
This role is for someone with an entrepreneurial mindset and strong ownership, someone who thrives at the intersection of strategic thinking and hands-on execution in a high-growth, early-stage environment.
Responsibilities
In this role, you will lead and optimize daily operations while building the scalable processes and internal structures needed to grow. You will translate strategic objectives into clear execution roadmaps, oversee partnerships, onboarding flows, and client operations, and support product and platform rollout from an operational perspective. Beyond the day-to-day, you will drive performance and organizational alignment, play an active role in fundraising processes and investor readiness, and build the operational teams that grow with GSES over time.
What You Bring
You are based in the Netherlands and bring 10 to 15 years of relevant professional experience, ideally within operations, scale-ups, or fast-growing startups. You combine strong leadership capabilities with a strategic mindset and a genuine bias for execution. You know how to translate vision into operational structure, communicate effectively with diverse stakeholders, and stay grounded in a dynamic, early-stage environment. Fluency in Dutch is required.
Nice to have:
- Experience in sustainability, ESG, or data-driven platforms
- Background in digital platforms or SaaS environments
- Experience with international or EU-funded projects
- Experience in fundraising or investor relations
What We Offer
This is a key leadership position within an impact-driven scale-up, offering direct influence on company strategy and long-term growth. You will have the opportunity to co-build an international sustainability platform from the inside, with a flexible working environment, a competitive compensation package including potential equity participation, and real long-term growth opportunities within GSES.
Working at GSES Means
Working at GSES means building infrastructure that supports global transparency and sustainability. It means contributing to meaningful international initiatives, helping shape a scalable organization, and playing a defining role in the growth phase of a mission-driven company with global ambitions.
Interested?
Do you want to help shape the future of sustainable decision making? Send your CV and motivation to [email protected] or reach out via the contact page. Let’s build a more transparent and sustainable global economy together.
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Senior PHP Laravel Developer
Vacancy
Senior PHP Laravel Developer
Join GSES as Senior PHP Laravel Developer and Build Technology for a Sustainable Future!
Are you an experienced PHP Laravel Developer who wants to work on scalable platforms with real societal impact? Do you want to take ownership, contribute to architectural decisions, and build digital infrastructure that supports transparency and sustainability worldwide? Then this role is perfect for you!
Location: On-site (Rotterdam), hybrid possible
Employment Type: Full-time
Salary: €5,000 – €6,000 per month
Extras: NS Business Card, Laptop, Management tasks
About GSES
GSES – Global Sustainable Enterprise System develops advanced systems that transform complex sustainability and ESG data into clear, reliable, and comparable insights. We are building digital infrastructure that supports transparency, sustainability, and data-driven decision making worldwide. Our technology supports governments, organizations, and international projects, including EU-funded initiatives, in building a more transparent and resilient future.
Your Role as Senior PHP Laravel Developer
As a Senior PHP Laravel Developer, you will play a key role in designing, building, and maintaining our core platform. You will work closely with product, data, and operations teams to ensure performance, security, and scalability. You will be expected to take ownership, contribute to architectural decisions, and mentor junior developers where needed.
Responsibilities
– Develop and maintain complex backend systems using PHP (Laravel).
– Design scalable, secure, and maintainable architectures.
– Optimize system performance and database structures.
– Integrate APIs, external data sources, and third-party services.
– Participate in technical decision-making and code reviews.
– Collaborate with product, data, and sustainability experts.
– Ensure high standards in code quality, testing, and documentation.
Requirements
– Based in The Netherlands.
– 7+ years working experience.
– Strong expertise in PHP and Laravel (senior-level).
– Strong knowledge of MySQL.
– Experience with Git-based workflows.
– Understanding of software architecture and design patterns.
– Ability to work independently and take ownership.
– Strong problem-solving and analytical skills.
– Management skills.
Nice to Have
– Experience with cloud environments (AWS, Azure, or similar).
– Experience with Docker / CI-CD pipelines.
– Knowledge of ESG, sustainability, or data platforms.
– Experience working in scale-ups or international projects.
What We Offer
– Senior technical role with real ownership & management tasks.
– Opportunity to work on impactful, international projects.
– Collaborative and mission-driven team.
– Flexible working environment (hybrid possible).
– Salary range: €5,000 – €6,000 per month.
– Long-term growth opportunities within GSES.
– NS Business Card for commuting.
– Company laptop.
Working at GSES Means:
– Building systems that matter for a more sustainable world.
– Being part of a team working on EU-funded initiatives and international projects.
– Contributing to transparency and data-driven sustainability decisions.
– Facing new technical challenges and opportunities to grow.
Are you ready to use your technical expertise to make a difference? Apply now and become our new Senior PHP Laravel Developer!
Apply Now!
Ready to build technology for a more sustainable world? Join us at GSES-System.com.
Send your CV and motivation letter to [email protected]. We look forward to welcoming you to our team!
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Onboarding and Support Staff (Fulltime)
Vacancy
Onboarding and Support Staff (Fulltime)
Join GSES as Onboarding and Support Specialist and Drive Sustainability Forward!
Are you customer-oriented, solution-driven, and passionate about sustainability and technology? Do you want to work in a dynamic team where your efforts directly contribute to our mission of making organizations more sustainable? Then this role is perfect for you!
Location: On-site (Rotterdam)
Employment Type: Full-time
Salary: Competitive
Extras: NS Business Card for commuting
About GSES System
GSES System is the leading international platform for sustainability and circularity. With our innovative tools, we help companies and organizations worldwide make sustainability measurable, manageable, and transparent. From our modern office in Rotterdam, we work daily toward a sustainable future.
Your Role as Onboarding and Support Staff
As part of the Onboarding and Support team, you will be the first point of contact for our customers. You will guide new users to successfully implement our platform and provide support with any questions or challenges. Your goal is to ensure our customers have a seamless experience and can fully leverage our tools.
What You Will Do
– Onboarding: Guide new clients step by step through the implementation of our system.
– Support: Provide technical and functional assistance via phone, email, and chat.
– Training: Organize training sessions and workshops to familiarize clients with our platform.
– Problem-Solving: Identify and report areas for improvement in the system’s usage.
– Collaboration: Work closely with the sales and development teams to ensure customer satisfaction.
What You Bring
– A minimum of a vocational or bachelor’s degree (preferably in a relevant field).
– Strong communication skills and a customer-focused mindset.
– Affinity for sustainability and/or technology.
– Proficiency in Dutch and English, both written and spoken.
– Experience in onboarding or customer service is a plus.
What We Offer
– A full-time position with variety and responsibility.
– A motivated and supportive team in the heart of Rotterdam.
– Competitive employment benefits.
– A company laptop to help you perform your tasks efficiently.
– Opportunities for personal growth and development within an innovative company.
Working at GSES Means:
– Contributing to a more sustainable world.
– Being part of an informal yet professional work environment.
– Facing new challenges daily and opportunities to develop yourself.
Are you ready to make a difference? Apply now and become our new Onboarding and Support Staff member!
Apply Now!
Ready to make a difference? Join us at GSES-System.com and help shape a more sustainable future.
Send your CV and motivation letter to [email protected]. We look forward to welcoming you to our team!
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International Sales Account Manager Events & Venues
Vacancy
International Sales Account Manager Events & Venues
Drive the Future of Sustainable Venues: Become Our Sales Champion!
Zoek je een uitdagende salesrol in de evenementen- en venuesector? Bij GSES System bouw je internationale relaties op, adviseer je over duurzaamheid en werk je samen met toonaangevende organisaties. Sluit je aan bij ons en maak wereldwijd impact op duurzaamheid!
Location: On-site (Rotterdam)
Employment Type: Full-time
Salary: Competitive
Extras: NS Business Card for commuting
About Global Sustainable Enterprise System (GSES)
GSES is a software (SaaS) solution enabling organisations to measure, compare and verify their sustainability performance. Based on international (ISO) frameworks, we have developed an overarching metastandard that is able to rate the full spectrum of sustainability. Not just carbon emissions, but also topics like circular economy, health & safety and biodiversity.
Our platform is a one stop for organisations who are looking to truly measure their performance and are bold enough to have their information verified by independent certified auditors. Our various standards cover organisations, products, events and assets.
We are a scale-up with an office in the vibrant city centre of Rotterdam (Weena 70), residing in a completely refurbished office building.
Your Role
As a Sales Account Manager for Events & Venues, you will be responsible for expanding and managing our international client base in the world of events and sports venues. You will operate in a dynamic and international environment, playing a crucial role in connecting partners and clients with our solutions.
What You’ll Do:
– Actively acquire new international clients and maintain relationships with existing clients.
– Advise event venues, sports stadiums, and organizations on sustainability and certification solutions.
– Develop and execute strategic sales plans targeting international markets.
– Collaborate with top organizations such as Johan Cruijff ArenA, KNVB, and international clubs like Atlético Madrid to provide tailored solutions.
– Represent GSES System as an ambassador at international trade shows and conferences.
– Support marketing campaigns and contribute to the strategic positioning of GSES System.
What We Offer:
– A challenging full-time position in an international environment.
– The opportunity to work with world-renowned events, stadiums, and organizations.
– A dynamic workplace, primarily based at our Rotterdam office, with travel to partner locations.
– Results-driven, energetic, and passionate about sustainability and innovation.
– Opportunities for personal and professional growth within a rapidly growing organization.
Your profile:
– Proven track record in sales, preferably in the events or venue sector.
– Excellent communication skills in both Dutch and English (additional languages are a plus).
– Experience in international markets and the ability to build long-term relationships.
– Results-driven, energetic, and passionate about sustainability and innovation.
– Willingness to travel and participate in international projects.
Apply Now!
Ready to make a difference? Join us at GSES-System.com and help shape a more sustainable future.
Send your CV and motivation letter to [email protected]. We look forward to welcoming you to our team!
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