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“We believe that we Add Value with our Team of passionate and highly qualified professionals, brokers, agents and support staff, who are all Inter-connected to assist with all of your Property and Business related needs.”

Commercial Property Agents Synonymous with Success

The Sentinel brand encompasses an impressive team of professionals, with an extensive track record of successful transactions in our range of services. What differentiates us from any aspiring competitors is the respected and industry leading business model and reputation associated with our brand and our commercial property agents.


The Sentinel ethos is comprised of distinctive, key principles that differentiate our team:

  • Innovative and forward-thinking business solutions and service offerings
  • An uncompromising commitment to stellar customer service
  • Unwavering integrity and ethics throughout our varied enterprises
  • A consistent, all-encompassing striving for sheer excellence


  • We are fully compliant under the Financial Intelligence Centre Act Our expert, in-house compliance officer ensures that we adhere to the compliance requirements of the Act.
  • We are members of the Cape Chamber of Commerce: The Cape Chamber of Commerce is the oldest member-based organisation on the African continent. It has remained contemporary and relevant, offering a broad range of business services, including information, training, networking, trade facilitation and robust advocacy on behalf of its members.
  • We are members of the Estate Agency Affairs Board: . All team members hold valid EAAB Fidelity Fund Certificates.

Our Team

It is a matter of professional pride at Sentinel Commercial Services to hire only the most astute business experts and commercial property agents who are exceedingly proficient in their field(s) of expertise. This is what we look for when inviting new members to join our ranks of experts. Below we have included a brief synopsis of some of our team members:
Anton Kotzee | Founder and CEO
Anton has an extensive background in the Asset Management industry. He is an excellent strategist and has started and successfully owned and operated many businesses over a variety of industries, including the Property and Financial sectors for the past 25 years. Anton has distinguished himself as a specialist in the investment property and business valuation sphere and is highly respected by his peers. He is a passionate entrepreneur with high business and ethical standards. He enjoys music, quality time with the family and good friends. He invests extensively in keeping up to date with the commercial property and business broking market.
Phillip Rutherford | Director and Principal Broker
Phillip is a highly skilled business man, with more than 30 years’ experience in corporate, as well as medium and small businesses within the Manufacturing, Automotive, and Personal Services sectors at Technical, Marketing and Executive levels. Phillip has bought, owned and sold several of his own businesses. He is qualified with Master of Science (UCT) and Master of Business leadership (UNISA) degrees and is accredited by Estate Agency Affairs Board as Master Practitioner Real estate (EAAB). Phillip enjoys investing, swimming and hiking in his free time.
Johan Taljaard | Head of Sales and Marketing / Mergers & Acquisitions
Johan is a specialist in selling Private Companies/Businesses and is experienced in the facilitation process of Mergers & Acquisitions across various industries. He has a background in Finance Brokerage and Project Management and has successfully started and managed businesses of his own, within the online marketing and Financial spheres. Johan holds a degree in BCom Entrepreneurship from the University of South Africa and is an enthusiast of sporting and outdoor activities.
Corné Oosthuizen | Commercial and Business Broker
Corné obtained his B Comm Marketing degree from the University of Pretoria as well as a Diploma in Wine from the Cape Wine Academy. He is an expert in marketing, gaining valuable knowledge from his years as the National and African Business Development Manager for a large wine distributor, as well as the National Account Manager for a large tobacco corporate. He is involved in his local community and enjoys sport, good wine and quality time with family and friends.
Dewald Olivier | Business Broker
Dewald has an extensive background in Hospitality Management and Operations and is the go-to guy, when it comes to the sales of Restaurants and Guest Houses in the greater Cape Town area. Dewald has an appreciation for the fine arts and enjoys singing (opera) and spending quality time with friends and family.
Mark de Klerk | Business Broker
Mark has a post graduate degree in Marketing & Brand Communications. He is actively involved in the marketing management of a large sporting events company and is a specialist in brand activation. He specialises in the selling of businesses in the larger Cape Town Area. Mark enjoys long distance swimming in his free time and has competed in numerous prestigious marathons such as multiple Robben Island crossings, as well as the Everest of Open Water Swimming, the English Channel and won various awards over the years.
Glenn Sullivan | Business Broker
Glenn comes from a strong accounting background. He obtained his BCom (Hons) from University of Natal, but has been situated in Cape Town for the past 26 years. He ran his own successful business for 13 years, before deciding to use his knowledge to assist business owners with the process of buying and selling business. In his free time, he enjoys travelling and keeping up with current affairs – especially within the South African socio-political environment.
Yolanda de Marcy Chelin | Executive Assistant to Phillip Rutherford and Johan Taljaard
Yolanda is a Paralegal with a hands-on approach. Her attention to detail makes her a valuable asset to the team. She assists both Phillip and Johan in the business sales department, but is also involved on the administrative and operational aspects of the company. Yolanda is a real asset to the company. She enjoys keeping up with current affairs and spending quality time with the family.
Tamlyn Henry | Office Administrator
Tamlyn obtained her National Diploma in Office Management and Technology and has many years of professional experience within the administrative field. Working in a highly pressurized and deadline driven environment has taught her to make use of time management skills ensuring that she meets deadlines without compromising the quality of her work. In her free time she enjoys reading and spending time with her family.
Stephan Malan | Regional Manager: Winelands
Stephan has a strong investment and management background. He is an astute business man with an extensive history within the financial industry. He has also successfully owned and operated various businesses of his own in the retail sector, with a focus on Fuel Stations and Security Estates. Stephan is an analytical and strategic business man with strong morals and a high regard for integrity. He has a passion for growing business and motivating teams to do so. He enjoys strategizing on the golf course in his free time.
Rob Rousseau | Commercial Property Broker
Rob has a BSc degree in Construction Management and has been involved in retail, office and residential developments and letting for the last 12 years. He is an experienced Property Manager and is currently completing his Masters Degree in property studies through the University of Cape Town.