OHMS is recognized as one of the preeminent, independent mining geotechnical engineering service providers in Africa, with a global presence.

We apply industry best practices through:

  • Meticulous collection and compilation of fit-for-purpose data.

  • Thorough analysis and interpretation of data to formulate geotechnical models.

  • Executing designs utilizing appropriate technology and responsible innovative solutions.

  • Providing optimal mine design criteria and facilitating implementation and execution plans.

  • Designing suitable rock mass response monitoring and design verification strategies and programs.

We strive to reduce the risk of our clients, which improves their sustainability, whilst adding value to their business and the communities in which they operate. OHMS provides our clients with a source of geotechnical knowledge and experience in a time when a higher level of input is required.


These values guide everything we do, including how we interact with our employees, how we interact with our customers and community, and how we interact with our vendors and business partners.


Our consultants are recognized industry leaders and are actively involved in the geotechnical engineering facets of mining projects worldwide. Collectively we boast an experience base of more than 200 years. Our technical team is supported by a competent finance, admin, and human resources team, which ensures that all financial and legal aspects are complied with.


Koos Bosman

Managing Director

Mbongeni Mabuza


Vlok Visser



André Esterhuizen

Senior Consulting Geotechnical Engineer

Gerrit Kotze

Senior Consulting Geotechnical Engineer

Marius Stander

Senior Consulting Geotechnical Engineer

Quintin Grix

Senior Consulting Geotechnical Engineer

Lorette Bester