About us

Part of our success over the years has been our driven, free-thinking approach to solving complex modern cybersecurity challenges. As the volume, frequency, and sophistication of cyberattacks continues to grow, our ability to dynamically adapt to changing security paradigms positions us well to protect our clients’ most important assets.

Nclose is supported by a team of 80+ engineers, business professionals and cybersecurity experts who work in a culture of openness and collaboration to ensure every client consistently receives excellent and effective cybersecurity services.

Our world-class Managed Security Services (MSS) and Managed Detection and Response (MDR) becomes an extension of your cybersecurity capability, perfectly amalgamating with your organisation’s operations, culture and capability, to give you a seamless cybersecurity experience unique to you.


The Nclose Difference

We’re partners not suppliers

You know how your business works and the risks you are exposed to. We know the global cybersecurity landscape and how to mitigate the risk. Together, we’re a powerful defence in depth partnership that delivers for your unique needs.

At Nclose, we take our alliances seriously. When we take over your environment, we integrate advanced security with your processes to become an extension of your business.

Our highly skilled teams deliver exceptional service. Our powerful services and solutions don’t just help defend against risks – we seek them out potential risks and exposure, remove points of failure and help you stay a step ahead of tomorrow’s risks. In short – we’ve got your back.

Proudly South African

Nclose is born in South Africa and recognised internationally. We’re the only South African MSSP to rank among the world’s top 250 in the 2021 MSSP Alert list.

Founded in 2006 by local technology experts to address local cybersecurity needs, we have built a portfolio of class-leading capabilities that perfectly align with South African organisations’ unique profiles. We know the skills and resource constraints all businesses face and have the ability to close the skills gap all businesses face.

But beyond our borders, our services can be consumed from any location in the world, delivering superb security control while addressing rigorous compliance mandates. We are helping elevate security for leading multinational enterprises, all while managing the balancing act of cost vs benefit.

Built. Not bought

We’ll build the platform that suits your needs, leaving nothing to chance.

We’re constantly refining and improving our capabilities as risks evolve; and we will constantly collaborate with you to ensure that your security flexes and adapts as your business changes.

Whether this means addressing changing endpoint protection needs, reimaging firewalls, or digging deep within your defences to find the gaps – we won’t stop refining and redefining your security and compliance posture. We know that even 99% secure and compliant isn’t good enough.

No excuses. No oversights. No more one size fits all.

Collective intellectual property (IP)

Our skilled engineering team works closely together, sharing learnings and knowledge from a multitude of different environments and scenarios to continually increase the combined intelligence of the team.

As one individual is exposed and overcomes to new challenges the collective IP of the team increases.

This collective IP concept embraces a stronger together mentality which is a major value add to our clients and partners.

The solution saved us a lot of effort as it met our stringent requirements from the outset.

Information Security Officer at Sanlam

Meet the Team

The Nclose team comprises over 80 security experts and analysts ready to support your cybersecurity strategy anywhere in South Africa.

Management Team

Stephen Osler

Co-Founder and Business Development Director

With a career spanning over 20 years in IT, Stephen started his professional career in London, working for eBookers.com, before his South African pride and optimism about the country’s future brought him back to South Africa to work in the technology infrastructure and security sectors. While developing a deep-seated focus on product perfection and client satisfaction, he also identified a gap in the local IT market – cybersecurity – which led him to co-founding Nclose and its cutting-edge solutions.

Martin Potgieter

Martin Potgieter

Co-Founder & Technical Director

Having grown up in San Antonio, Texas, Martin’s passion for cyber security dates back as far as 1999.  His focus on preventing cyber-attacks from happening has made him an excellent ‘tracker’ of potential risks and weaknesses within systems, with in-depth knowledge of how to mitigate them.

He deploys his passion for creation, combined with continuous improvement, to build robust cybersecurity systems and processes that adapt and evolve in step with whatever attack methods cybercriminals try.

Paul Graapendaal
Paul Grapendaal

Head of Managed Security Services

With over 25 years’ experience in the IT industry, Paul is a Certified Information Systems Security Professional (CISSP), leading a team of professionals in the delivery of Managed Security Services to numerous clients across many industry verticals. During his time as an engineer and consultant, he has built up significant experience designing, deploying and managing technologies like McAfee, Forcepoint, Palo Alto, FortiGate, Check Point, Cisco, BlueCoat and RSA. He is fluent in his understanding of most network security technologies including SIEM, firewalls, IPS, DLP, two-factor authentication, proxy servers and mail content gateways.

Managed Security Services Team

Adeel Sambo

Adeel Sambo

Shaun Pretorius

Shaun Pretorius

Yusuf Simon

Yusuf Simon

Callan Blount

Callan Blount

Werner Overbeek

Werner Overbeek

Stewart Gilbert

Kyle Jones

Frederick Boonzaaier

Tristrum Fitzgerald

Tristan Jeniker

Heydenreich Rothmann

Ayden Smith

Imran Hendricks

Wayde Davenall

Darren Hayward

Alfonso September

Cassandra Demmer

Brandon Venter

Dewald Vos

Phuti Teffo

Mikail Van Der Westhuizen

Cornelis Rabie

Sales Team

Sian Ribet

Sian Scholtz

Caeli Manuel

Caeli Manuel

Gary Hartogh

Luke Chapman

Rebecca Marwick

Steven James

Samantha Van Der Westhuizen

Samantha Barlow

Leigh Ann Figueira

Administration Team

Ashton Abrahams

Ashton Abrahams

Carine Swanepoel

Diane Brits

Alfred Payne

Bridget Carter

Darren Nair

Kashiefah Fortunte

Project Management Team

Shenaaz Fowkes

Estelle Stuurman

Montague Guest

Managed Detection & Response Team

Bradley Bosman

Bradley Bosman

Lindokuhle Mngadi

Lindokuhle Mngadi

Rory Nasson

Rory Nasson

Markus Swanepoel

Markus Swanepoel

Abduragheem Jattiem

Abduragheem Jattiem

Miles Collins

Mogamedi Tau

Benedikt Boehm

Mfundiso Makabane

Elridge Van Zyl

Teboho Mokalake

Sean Parker

Devon Dutoit

Arikonisaho Makwarela

Dylon Petersen

Tamaryn Limerick

Charl Roux

Martinus Bakeberg

Kieran Roberts

Liyabonga Saki

TJ Roberts

Johannes Du Preez

Regomoditswe Diale

Vuyokazi Ngqele

George Bence

Uhone Luruli

Work With Us

We know people are key to our success, so our culture fosters job satisfaction and ongoing professional development. If you’re committed to integrity, professionalism, service and innovation, you’ll feel right at home in our fast-growing team.

Doing Good

Our CSR initiatives focus on preparing the youth for the fourth industrial revolution by providing access to digital tools.

Many school-aged learners in South Africa have no access to computers and the associated technology. This puts them at an immediate disadvantage, given the speed at which the world is changing and how reliant we are on tech and the internet. We aim to be part of the change that allows South Africa’s youth to be comfortable with everything digital from a young age by financially supporting the MiDO Foundation. 

The MiDO Foundation 

The MiDO Foundation gives school learners the opportunity to improve their digital literacy by making use of digital hubs that the Foundation installs in disadvantaged schools around the country. The digital hubs allow learners access to tech that helps them gain valuable skills needed to prepare them for the working world. They learn hard skills like coding, as well as soft skills that include teamwork, critical thinking, and effective communication.

The foundation also helps small businesses owners become familiar with online tools to grow their businesses and digital literacy skills.  


Nclose currently has eight learners who have been awarded bursaries, ranging in age from 8 years old to 20 years old.

mido foundation
Doing Good

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