Marketing Assistant

We are seeking a proactive and organized professional with a strong people-oriented mindset to join our growing team as a Marketing Assistant . If you thrive in a dynamic environment, enjoy multitasking and bring structure and energy to your work; this role is for you! The Marketing Assistant plays a vital role in supporting the Marketing team in achieving business objectives. This position involves a mix of administrative, organizational, external events and customer-facing tasks to ensure smooth operations and enhanced customer experience.

Optics11 is a world leader in fiber optic sensing technology for ultra-sensitive early warning systems. From our base in the Netherlands – a global hub for high-tech innovation and maritime expertise – we are on a mission to make the world safer by protecting critical infrastructure such as sea-lanes, offshore energy assets and subsea cables from disruption. Optics11 recently closed a €17 million investment round.

About the role:

As Marketing Assistant, you will support the day-to-day execution of our Underwater Security marketing activities. You will help deliver campaigns, keep sales and marketing materials up to date, and coordinate events from preparation through follow-up.

What will you do?

- Support the execution of marketing campaigns for our Underwater Security portfolio, including content, LinkedIn, email and website updates.
- Create and maintain marketing materials such as brochures, presentations, promotional content and event materials using approved messaging and templates.
- Coordinate conferences, trade shows and customer events, including registrations, travel, accommodation, logistics, suppliers and exhibition materials.
- Support event promotion, attendee coordination and on-site activities, including welcoming visitors and connecting prospects with the right Sales or technical colleagues.
- Manage event and campaign contacts in HubSpot, ensuring accurate data, clear next steps and timely handover to Sales.
- Keep marketing calendars, tasks and deadlines on track, coordinating inputs and approvals across internal teams and external suppliers.
- Support supplier, invoice and event expense administration and compile basic campaign and event reporting.

What we offer

- The chance to work with innovative technology with real-world applications in underwater security.
- An international, fast-growing working environment.
- 30 vacation days per year.
- Employer pension contribution.
- Fresh team lunches provided 5 times/ week.

Requirements

Who are you?

- You have at least an HBO-level education.

- At least 3 years of experience in a similar supporting role.

- Strong organizational and multitasking skills.

- Excellent proficiency in English, both written and spoken.

- Professional working proficiency in Dutch is an advantage.

- Proficiency in CRM tools and Microsoft Office Suite.

- Basic knowledge of digital marketing tools (e.g. social media platforms, email marketing tools).

- Experience in a fast-paced, technical environment with strong attention to detail.

- Facilitative, supportive, and solution-oriented mindset.

- Enthusiastic, flexible, and resilient under pressure.

- Ability to set priorities effectively and adapt to changing needs.

- Team player who enjoys supporting and collaborating with others.

We are seeking candidates who are already residing in the Netherlands.