Senior Infra & Security Engineer

TWD; Rotterdam; Presencial; EUR 48.000 - 57.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

8% holiday allowance

Collective pension

Monthly travel allowance

25 holidays per year and overtime

Lunch buffet

Annual company trip

Friday drinks & events

Descripción de la vacante

TWD in Rotterdam seeks a Senior Infra & Security Engineer to own and improve our IT infrastructure, security, and operations across offices. You work with a small IT team and external partners to build a reliable, future‑proof environment and to grow toward IT Lead.

You will focus on networks, Microsoft 365, access management and cybersecurity, with Defender and Intune as key tools. English fluency is required, Dutch a plus, and you’ll collaborate across departments while improving processes.

Formación

• Bachelor's degree in IT or related field
• 3–5 years IT infrastructure and network management experience
• Practical knowledge of networks, firewalls and switches
• Experience with Microsoft 365, workplace management and IAM
• Knowledge of cybersecurity and secure system management; Defender/Intune is a bonus
• Experience with project coordination, guiding colleagues or managing vendors is a plus
• Fluent in English; Dutch is a plus

Responsabilidades

• Manage and improve networks and infrastructure across all offices
• Analyse incidents and configuration issues with colleagues
• Monitor availability, capacity and security; follow up on actions
• Improve cybersecurity with Defender, Intune and secure access management
• Handle security alerts/incidents with partners and audits
• Govern identities and access rights per IAM policy
• Provide support and create clear processes with IT colleagues
• Lead technical improvement projects end-to-end
• Manage vendors on the technical side; contribute to licences and renewals
• Share knowledge with colleagues

Conocimientos

Networks

Microsoft 365

Identity management

Cybersecurity

Microsoft Defender

Vendor management

Project coordination

English fluency

Educación

Bachelor's degree in IT

Herramientas

Intune

Defender

Descripción del empleo

Do you have a solid background in IT infrastructure and network management, and do you want to make our IT more secure and reliable? Are you looking for a hands‑on role in which you take technical ownership, with the opportunity to grow into IT Lead? Then we are looking for you!

Foundations of Your Job

As Senior Infra & Security Engineer at TWD, you work with a compact IT team and external vendors to keep our IT environment reliable, secure and future‑proof across all our offices. You are at home in infrastructure, networks, Microsoft 365 and access management. With that expertise, you work on our most important improvement goal: making our network and our data more secure. You report to the Technical Manager and work closely with our Software Engineering department. You work from our office in Rotterdam and occasionally visit our offices abroad.

A glimpse of your responsibilities:

• Managing and improving networks and infrastructure across all our offices, and keeping the network documentation up to date

• Analysing and solving complex incidents and configuration issues yourself, together with colleagues and external specialists

• Monitoring the availability, capacity and security of systems and networks, following up on improvement actions and providing insight into performance and risks

• Improving cybersecurity with practical measures such as Microsoft Defender, managed devices (Intune, MDM/MAM) and secure access management

• Following up on security alerts and incidents with external partners, and supplying technical information for client audits

• Governance of identities and access rights in line with the IAM and PIM policy

• Working with your IT colleagues to provide good support and clear, workable processes

• Leading technical improvement projects from preparation to delivery, and automating recurring management tasks where possible

• Managing vendors on the technical side and contributing to contracts, licences, procurement and renewals

• Guiding colleagues on technical matters and sharing your knowledge

What Makes You Great

You combine technical knowledge with a practical approach. You understand how networks, workplaces, cloud environments and access management fit together, and you build security into your daily work. You look for the root cause of recurring problems and explain technical choices clearly. You don’t need to be a security specialist yet: you have a solid foundation, take responsibility and want to develop yourself and others further.

You are the perfect match for TWD if you also have the following skills and experience:

• A bachelor’s degree in IT, Computer Science or a related field, or equivalent experience

• 3–5 years of relevant work experience with IT infrastructure and network management, for example as a system administrator or IT engineer

• Practical knowledge of networks, firewalls and switches, and experience analysing and solving technical incidents

• Experience with Microsoft 365, workplace management and identity and access management

• Good knowledge of cybersecurity and secure system management; experience with Microsoft Defender and Intune is an advantage

• Experience with project coordination, guiding colleagues or managing vendors is a plus

• Fluent in English; Dutch is a plus

At TWD you can develop further in securing our IT environment and grow into the IT Lead role. Together with the Technical Manager, you will expand your responsibilities step by step: from technical projects and guiding colleagues to day‑to‑day management, vendor management and team leadership. You will get room for targeted training and coaching. Previous formal management experience is not required.

TWD – A Fun Challenge to Be Part Of

At TWD we love to create construction methods and design installation equipment. We achieve creative, simple, and efficient solutions through dedicated teamwork. Thanks to our core values – Fun, Development, and Happy Clients – we grow at a rapid pace with 300 talented people in four locations: Rotterdam, London, Athens and Taipei.

Every day we contribute to the energy transition and key infrastructure projects worldwide. We do this by offering innovative design solutions to our clients, mainly in the offshore wind and Heavy Civils industry.

Why You Will Love Working at TWD

Working at TWD means working in an exciting, fast‑paced industry and making a difference in shaping a more sustainable future. We offer a collaborative and supportive working environment that will stimulate you to take the lead in your professional and personal development. Our people describe TWD's culture as open, no‑nonsense, diverse, and informal - valuing your ideas and contributions.

Working at TWD includes:

• A salary starting from € 4,700 gross per month, depending on your experience

• 8% holiday allowance per year

• Collective pension

• Monthly travel allowance

• 25 holidays per year and compensation of overtime

• A free healthy and sustainable lunch buffet, prepared daily in our own Lunchroom

• An exciting company trip each year where TWD offices come together

• Friday afternoon drinks and special TWD events such as sports events, pub quizzes, ladies’ night, and various social gatherings

At TWD, we celebrate diversity and inclusivity, welcoming individuals from all backgrounds. We continuously work on enhancing our recruitment process, ensuring fairness and inclusiveness at every step.