CSS Manager
- On-site, Hybrid
- Zaltbommel, Gelderland, Netherlands
- CSS
The customer journey starts with you! As a CSS Manager, you are the key link, you ensure the quality of our service delivery and proactively initiate improvements.
Job description
CSS Manager
The customer journey starts with you! As a CSS Manager, you are the key link between the client and our Security Operations Center (SOC), and the Account Managers. You ensure the quality of our service delivery and proactively initiate improvements. With your sharp analysis, clear oversight and strong communication skills, you help clients continuously optimize their cybersecurity within a Zero Trust framework.
In short: you manage agreements made, and work to structurally improve cybersecurity.
Key responsibilities:
Monitor and safeguard service levels (SLAs/KPIs);
Manage incident, complaint, and escalation processes with a focus on customer satisfaction;
Continuously improve the customer experience and service quality;
Translate customer insights into concrete service improvements.
Job requirements
Requirements:
Bachelor’s or Master’s degree, preferably in IT or related field;
Minimum 5 years of experience in a similar role within a managed services environment;
Familiarity with frameworks such as ITIL and/or ITSM;
Growth mindset, customer-focused, and proactive attitude;
Strong communication skills in both Dutch and English.
Why ON2IT:
At ON2IT, we work with passion to make the digital world safer. As an ambitious global player in cybersecurity, we protect organizations worldwide from digital threats through our offices in the Netherlands and the United States.
Our strength lies in our approach: “Never trust, always verify.” Using the Zero Trust model, we help our clients stay ahead of data breaches and cyberattacks. And if something does happen, we know within minutes what occurred, which data was affected, and whether the issue has been resolved.
Everything we do revolves around customer security – with dedication, speed, and precision. Our unique Zero Trust approach gives you the opportunity to grow and truly make an impact as a cybersecurity professional. Together, we are building a future where digital security is second nature. We do this in an environment where we challenge each other every day, surrounded by colleagues who bring out the best in one another.
What we offer
Innovative environment: A workplace where creativity, adaptability and innovation are at the core;
Global impact: Your work contributes to securing organizations around the world;
Autonomy & trust: You’ll have the freedom and responsibility to make a difference;
Ongoing learning: Unlimited access to training, courses, and certifications;
Hybrid working: Work from home and at our modern office in Zaltbommel;
Strong team culture: We lunch together, work together, and celebrate together – in an open and engaging environment.
Are you ready to be ON2IT?
It’s in the name: at ON2IT, you stay on top – of threats, opportunities, and your own development. That’s what we expect from you. Because that’s how we truly make a difference.
Sound like you? Apply now as CSS Manager.
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Who are we?
ON2IT is an international cybersecurity company with Dutch origins. In 2005, the company was founded by Lieuwe Jan Koning and Marcel van Eemeren and in 2018 we expanded internationally to the US with an office in Plano, TX. We now have over 300 customers around the world and continue to grow.
More than 19 years of experience has taught us that cybersecurity needs and priorities vary greatly from one company to another. Therefore, together with our customers, we look at which parts of their cybersecurity need the most attention.
The ON2IT team consists of driven employees who want to add something to their profession and want to make a difference. Personal development is important to us. We strive to be the best in the field of IT security.
We are successful in what we do, as evidenced by the growth we experience as an organization year after year. Together we are building an even brighter future. This year, we are growing faster than ever before. Will you be joining our team?

Are you joining our team?
Have we managed to excite you about this job and our company? Then we look forward to receiving your application! You can apply by clicking the button below. Don’t have an up-to-date resume or have questions about our job procedure? Don’t hesitate to call to our HR-team at +31 (88) 22 66 200 to discuss the possibilities.

our location
Our office is located in the province of Gelderland, directly next to the A2 highway. From both directions (Utrecht and ‘s-Hertogenbosch) you take exit 17 to Zaltbommel. Address Hogeweg 35 5301 LJ Zaltbommel