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Delver street Tunnel entrance to Sanlam Center, JHB.

Bomar is a contracting company operating in both the underground mining and civil engineering industries. Our offices are located in Rivonia, South Africa.

We have over the years established a distinguished record of involvement in some of the major underground projects carried out both within South Africa and elsewhere.

Our approach to projects differs from that of larger, higher profile organisations. Great emphasis is placed on speed and economy, obtained through the application of state-of-the-art technology, and dedicated, focused management.

The company specialises in tunnel development, including decline and raise shafts, both as a contractor (typically in a capacity as a Joint Venture partner with other contracting companies) and as a specialist tendering/cost consulting service provider.

In recent times, the South African hardrock mining industry has recognised the urgent need to introduce mechanisation and new technology into its operations, in order to remain globally competitive. Bomar is, through its accumulated experience and expertise, ideally placed to contribute to this revolutionary change in the production workplace.

Considerable time and effort has been expended by Bomar in IP development, and, as a result, we have developed technology and registered several patents for a number of mechanised mining solutions, which offer real economic benefits to the mining industry. In addition, the technology offers improved workplace safety and significant skills development opportunities to people from historically disadvantaged communities: both of these represent high priority goals for the industry

During 2001, a small diameter TBM (tunnel boring machine) trial at Anglo Platinum’s BRPM Mine, successfully demonstrated the potential for mechanised development of reef raises. Analysis of this performance has led to the design of a machine which is custom built to address the various technical issues unique to a raise environment.

The raise TBM has been developed in conjunction with various other innovations to permit complete mechanisation of stoping operations to take place, centred around the Megamole stoping machine. Detailed presentations are currently ongoing with various Mining House clients regarding the implementation of full scale trials of this machine.

The Directors of Bomar are convinced that Bomar’s technology represents a real opportunity to achieve commercially viable mechanized production within a narrow tabular reef environment, well ahead of other technology-driven competitors


As Bomar’ s founding Director, Mario Pietromartire has 50 years experience in the underground construction industry (40 years of which were gained in the contracting environment).

Mario has achieved and still holds several records in South Africa, namely:

Drill and blast : 393m per month in a 30m2 cross section tunnel with a best day advance of 20m.
  189m per month in a 20m2 cross section at 14.5 degrees decline.
  159m per month or 10 812m3 in a 68m2 cross section tunnel.
  7m per day advance per day using the Alimak climber.


Bomar's Managing Director, Gareth Phillips, is a dedicated and proficient Mining Engineer with specific expertise in Mine Managment.

With almost twenty years of exposure and steady promotion in the Mining Industry, Gareth offers depth of knowledge and wide experience in all departments of mine managment, and has held such portfolios from Senior Operations Manager to Senior Mining Engineer (Projects) to Corporate Manager Mining and Managing Director.

He has the advantage of experience in both underground and open cast mining in the Gold Mining industry in Africa. In leading the design and implementation of new mining projects, and in revitalising existing operations, he has added value and contributed towards achievement of Company goals and increased production.

Director, Romano Pietromartire has 31 years experience in tendering and planning in underground construction. He has co-operated with several of the large South African companies in the preparation of tenders and has a reputation throughout the industry as an excellent estimator. He has contributed technically to the development of the various patents.

The company’s policy to outsource its professional and specialist resource requirements lends to its low overhead demands.


Indawo Ye Golide Investments (Pty) Ltd, a wholly Black Owned company has acquired 26% of Bomar Projects.

The appointed BEE director is MK Mohlala, who holds a Business Administration degree from Stellenbosch Business School; Bachelor of Administration from Unisa; Diploma in Management from the European School of Management; Executive Education Program – Harvard University, has worked for Eskom for sixteen years, and as CEO of City Power was responsible for successfully managing a turnover of R3.2b.

He currently serves as a non-executive director on the boards of companies in the mining, IT and service sectors.

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