What people say
Recommendations from the people I've worked with.
I had the pleasure of working with Sebastiaan during my tenure as a CISO, and I can confidently say that he is a true cybersecurity expert. From the very beginning, Sebastiaan helped me define a robust strategy and played a pivotal role in…
I had the pleasure of working with Sebastiaan during my tenure as a CISO, and I can confidently say that he is a true cybersecurity expert. From the very beginning, Sebastiaan helped me define a robust strategy and played a pivotal role in transitioning our SOC into a modern, efficient operation with significantly faster detection and response times, as well as enhanced ransomware protection. He consistently went above and beyond his responsibilities, demonstrating a deep commitment to our success. Sebastiaan's "cyber war" experience stories are not only insightful but also a testament to his extensive knowledge and expertise in the field. Beyond his professional capabilities, he is a kind and considerate person who genuinely cares about the individuals he works with. I highly recommend Sebastiaan for any role that requires a dedicated and knowledgeable cybersecurity professional.
I know Sebastiaan since his days with McAfee and have been working with him very closely on Strategic, Tactical and even Operational level during his time at CybeReason. I can truly say I would trust him with my 'Cyber-Life' blindly. -He…
I know Sebastiaan since his days with McAfee and have been working with him very closely on Strategic, Tactical and even Operational level during his time at CybeReason. I can truly say I would trust him with my 'Cyber-Life' blindly. -He has the vision to look ahead long term, device a Cyber-Strategy and relay this concisely and precisely to all levels of management. -He has a thorough understanding of relevant architectural and technological concepts to guide and drive the actual implementation in both small high expertise teams as well as in very complex international, distributed and federated enterprises. -And on top of that he has the real world 'in the trenches' operational experience in many, many cyber related events both big and small, to provide actual immediate security detection and response impact in major cyber related event. In his commercial relationship with his customers and other stakeholders he is honest, transparent and willing to take that extra step, to find the win-win outcome for all involved in the commercial endeavour. I would want Sebastiaan to be on my team, whatever cyber related challenge I would face!
I've worked with Seb for almost 2 years at Cybereason and I would love to work with him again! Seb is one of the best Security Principal I've seen in my career. With his hands on experience and no nonsense style he wins the trust of his aud…
I've worked with Seb for almost 2 years at Cybereason and I would love to work with him again! Seb is one of the best Security Principal I've seen in my career. With his hands on experience and no nonsense style he wins the trust of his audience very quickly.... and he's fun to work with!
I Like working with Sebastiaan, because of the way he delivers a story or message using examples of his previous experiences in the CyberSecurity field.
I Like working with Sebastiaan, because of the way he delivers a story or message using examples of his previous experiences in the CyberSecurity field.
I had the chance and honour to work with Sebastiaan. Sebastiaan was supporting me and my team on the North market. He is a strong professional with huge technical background. Very trustful, he has a strong engagement for the team and his cu…
I had the chance and honour to work with Sebastiaan. Sebastiaan was supporting me and my team on the North market. He is a strong professional with huge technical background. Very trustful, he has a strong engagement for the team and his customers. Always happy to help and support, he finds all the solution to make customers happy and the team successful. I strongly recommend you to have Sebastiaan in your company.
I had the pleasure to work with Sebastian for multiple years at Intel Security/McAfee. Sebastian is a great colleague to work with. He has tremendous knowledge and knows how to convey this in an inspiring and convincing manner to customers.…
I had the pleasure to work with Sebastian for multiple years at Intel Security/McAfee. Sebastian is a great colleague to work with. He has tremendous knowledge and knows how to convey this in an inspiring and convincing manner to customers. Sebastiaan was often the trusted advisor for large enterprise accounts and his contribution made many successes. In my opinion, Sebastiaan is one of the best in his profession and I would not hesitate for a moment if I could work with him again. Sebastiaan is a huge asset in a team on both personal and technical content.
Sebastiaan is one of the most knowledgeable persons I have met over the last 7 years in the field of cyber security. He has deep technical skills but is also capable of seeing the whole picture, and has helped large enterprises to fundament…
Sebastiaan is one of the most knowledgeable persons I have met over the last 7 years in the field of cyber security. He has deep technical skills but is also capable of seeing the whole picture, and has helped large enterprises to fundamentally improve on their security strategy. He is always prepared to go the extra mile, and very likable too. I enjoyed working with him for the last 4 years and would be happy to work with him in a team again, any time.
Sebastiaan is a fantastic colleague to work with and he has demonstrated to be able to act well on multiple levels. Not only the market recognizes his deep technical knowledge but he is also very much appreciated on his vision and strong ab…
Sebastiaan is a fantastic colleague to work with and he has demonstrated to be able to act well on multiple levels. Not only the market recognizes his deep technical knowledge but he is also very much appreciated on his vision and strong ability to present/ articulate and demonstrate an great insight in the Cyber Security market.
Working with Sebastiaan completely overhauled by vision on working with people from a technical background. Although Sebastiaan understands and practices security thoroughly, his real asset is his business acumen and his skill to position h…
Working with Sebastiaan completely overhauled by vision on working with people from a technical background. Although Sebastiaan understands and practices security thoroughly, his real asset is his business acumen and his skill to position himself and the solution he sells in such a way, that a customer cannot ignore his invincibility and wants to continue to work with Sebastiaan. I would hire Sebastiaan immediately to any company I work for/will work for in future!
Sebastiaan is a true professional who makes the difference on both high executive to operational level. Understanding (business) processes within organizations and the impact that projects have and how they should be organized to guarantee…
Sebastiaan is a true professional who makes the difference on both high executive to operational level. Understanding (business) processes within organizations and the impact that projects have and how they should be organized to guarantee success, he is a true strategist. He is highly skilled and understands technology in the broadest way and can easily distinguish relevance quickly, saving time and money for organizations. Sebastiaan is a very strong listener and judge of character/ personality. Through that he can quickly assess the way somebody thinks or processes used. With his people skills and strong founded recommendations, he is able to adapt his communication to the other party. This always results in becoming a trusted advisor and open relationship build for success. As a person Sebastiaan is a loyal team player, once you have gained his trust.
Easily one of the most inspiring and dedicated individuals I have ever met. With his friendly and open demeanour he always has time and balance to not only provide services and assistance as part of his work duties but also able do the same…
Easily one of the most inspiring and dedicated individuals I have ever met. With his friendly and open demeanour he always has time and balance to not only provide services and assistance as part of his work duties but also able do the same to those colleagues he comes in contact too. All this while also maintaining a highly efficient, professional and effective work ethic that is second to none.
Sebastiaan is a highly intelligent individual who has the ability to work on his own initiative as well as part of a team. His understanding of the Data Security market is outstanding and he has always been a pleasure to work with. A very s…
Sebastiaan is a highly intelligent individual who has the ability to work on his own initiative as well as part of a team. His understanding of the Data Security market is outstanding and he has always been a pleasure to work with. A very smart and driven employee. Highly recommended.
Sebastian is a very skilled and knowledgable PreSales. he knows what and what not to doand say in C-Level meetings. Since he is very skilled in IT Security, he is a valuable asset in any meeting with IT Architects and IT Management. He has…
Sebastian is a very skilled and knowledgable PreSales. he knows what and what not to doand say in C-Level meetings. Since he is very skilled in IT Security, he is a valuable asset in any meeting with IT Architects and IT Management. He has helped me a great deal in Achieving my Sales Targets.
I worked with Sebastiaan at McAfee and must say I was impressed with his knowledge and enthusiasm. Sebastiaan is very capable of understanding the overal picture and thinking ahead when looking at customers needs. If ever you are looking fo…
I worked with Sebastiaan at McAfee and must say I was impressed with his knowledge and enthusiasm. Sebastiaan is very capable of understanding the overal picture and thinking ahead when looking at customers needs. If ever you are looking for a Technical person to add value to your team the Sebastiaan will be the right person for the job.
Highly technical and commercial skills in one person...a rare combination. At the same time a very keen teamplayer and nice person. Would like to work with Sebastiaan again!
Highly technical and commercial skills in one person...a rare combination. At the same time a very keen teamplayer and nice person. Would like to work with Sebastiaan again!
Sebastiaan understands and masters being a true sr. Pre Sales Consultant. Understaning business issues in combination with an in-depth technical knowledge regarding Security Risk Management make him an ideal patricipant in any customer meet…
Sebastiaan understands and masters being a true sr. Pre Sales Consultant. Understaning business issues in combination with an in-depth technical knowledge regarding Security Risk Management make him an ideal patricipant in any customer meeting and/or presentation. Sebastiaan seperates himself from others by his positive and pro-active customer & opportunity management. A pleasure having him support our teams efforts within the Enterprise segment of McAfee. I recommend Sebastiaan to any organisation looking for a true pre-sales professional.
Sebastiaan, is one of the smartest security professionals i have had the pleasure of meeting and working with. Not only is Seb a true techy, he combines this with a very astute commercially aware business sense. An asset to any high tech b…
Sebastiaan, is one of the smartest security professionals i have had the pleasure of meeting and working with. Not only is Seb a true techy, he combines this with a very astute commercially aware business sense. An asset to any high tech business.
Sebastiaan is a highly energetic individual with in debth knowledge in the IT security arena. When Sebastiaan is around be prepared to see lots of actions and positive outcomes as well as lots of fun.
Sebastiaan is a highly energetic individual with in debth knowledge in the IT security arena. When Sebastiaan is around be prepared to see lots of actions and positive outcomes as well as lots of fun.
I had the privilege to work with Sebastiaan and found him extremely professional, one of the most experienced security professionals in the Dutch marketplace, very capable of translating customers requirements into technical solutions, and…
I had the privilege to work with Sebastiaan and found him extremely professional, one of the most experienced security professionals in the Dutch marketplace, very capable of translating customers requirements into technical solutions, and on a personal level just a great guy with a good character. If he promises something he will always deliver.
I have had the pleasure of working with Sebastiaan on several opportunities. He has a great knowledge and expertise in the security market and is a very professional individual. I look forward to working together again soon.
I have had the pleasure of working with Sebastiaan on several opportunities. He has a great knowledge and expertise in the security market and is a very professional individual. I look forward to working together again soon.
Working with Sebastiaan is a pleasure, i can't describe it otherwise. His sense of humor, both in front of the customer, and in social engagements are in good balance with his excellent professional skills. I have been to customers togeth…
Working with Sebastiaan is a pleasure, i can't describe it otherwise. His sense of humor, both in front of the customer, and in social engagements are in good balance with his excellent professional skills. I have been to customers together with Sebastiaan, and his way of delivering a product presentation, and engaging with all kinds of different entitities and people within my customers organisation is pretty awsome. Hey has undoublty contributed in taking the sales cycle to the next level, and i would very much love to work with him again when our paths cross in the future.
Sebastian is a very well grounded engineer in the security business. His mental capacities and strength, product and business related know how are a guarantee for success at channel and enduser customers.
Sebastian is a very well grounded engineer in the security business. His mental capacities and strength, product and business related know how are a guarantee for success at channel and enduser customers.
Sebastiaan is a very intelligent, hard working security manager who is well informed on the latest and upcoming technologies. A very pleasant person to work with, very accurate with eye for detail.
Sebastiaan is a very intelligent, hard working security manager who is well informed on the latest and upcoming technologies. A very pleasant person to work with, very accurate with eye for detail.
Sebastiaan is a highly professional co-worker, he has excellent network and security skills. I recommend Sebastiaan fully, it has truly been a pleasure to work with him.
Sebastiaan is a highly professional co-worker, he has excellent network and security skills. I recommend Sebastiaan fully, it has truly been a pleasure to work with him.
I have worked with Sebastiaan in several occasions. Sebastiaan proved to be a very professional person, with a with very good technical knowledge. He has been of great support in my role as Architect for several companies. A great technical…
I have worked with Sebastiaan in several occasions. Sebastiaan proved to be a very professional person, with a with very good technical knowledge. He has been of great support in my role as Architect for several companies. A great technical person with matching commercial skills! I higly recommend Sebastiaan and whenever I get the chance would love to work with him again.
Sebastiaan was my knowledge point for network- and security questions back at NedSecure. He's an eager person who wants things to be done correctly. He's also trustworthy towards customers, which is very important in my eyes.
Sebastiaan was my knowledge point for network- and security questions back at NedSecure. He's an eager person who wants things to be done correctly. He's also trustworthy towards customers, which is very important in my eyes.
Sebastiaan is a hard working and enthusiastic engineer. He is eager to learn and not afraid to try new things while making sure the customer is provided for. Excellent person! Highly recommended.
Sebastiaan is a hard working and enthusiastic engineer. He is eager to learn and not afraid to try new things while making sure the customer is provided for. Excellent person! Highly recommended.
Working with Sebastiaan at NedSecure was a great pleasure. He is a professional with a very good technical knowledge and a reliable and dedicated person. He has been of great support in my role as Sales Manager in pre-sales and implementing…
Working with Sebastiaan at NedSecure was a great pleasure. He is a professional with a very good technical knowledge and a reliable and dedicated person. He has been of great support in my role as Sales Manager in pre-sales and implementing numerous projects. I could fully rely on his technical knowledge and his pre-sales skills. A great technical person with commercial skills to have in my team!
