Executive Directors

Justin Colling  |  CEO

National Diploma Civil Engineering (Cum Laude)

Mr Colling has had 25 years of contract and mining experience, including 9 years in Africa and 5 years in Asia.

He was previously the Chief Executive Officer of eXtract Group Limited (formerly known as Eqstra Holdings Limited) and MCC Contract Mining. TO 4Bil and 4500 people.

He was an Executive General Manager with Thiess Africa (Proprietary) Limited and President Director of PT Leighton Contractors Indonesia and Executive General Manager of their Asia Mining business. TO US$1 Bil and 9000 people.

Prior to that, Mr Colling served as an Executive Director of Aveng Mining – Moolmans South Africa.

During this time he has worked on a variety of projects, commodities, clients and countries.

Gillian Miller  |  COO

CIS (Associate), CIBM

Ms Miller was previously the Group Company Secretary, Corporate Services and Legal Executive for Buildmax Limited. She is the COO at Buildmax and fulfilled the role as CEO of Buildmax Limited in an interim capacity.

She is also the Group Company Secretary for Andulela Holdings Limited and was previously employed as a Senior Governance Consultant with KPMG South Africa.

Her other qualifications include:

  • Member of the Institute of Directors South Africa
  • Affiliate Member of the Chartered Institute of Business Management
  • Full member of the Institute of Internal Auditors
  • Member of the Compliance Institute of South Africa
  • Certificate in Project Management (Harvard)
  • International Accredited Trainer
  • Guest Lecturer (University of Pretoria)

Non-Executive Directors

Bulelani Ngcuka


Since admission as an attorney in 1980 Bulelani has held senior positions in various law firms. He has also been involved in a number of committees and was elected to the Senate as Chief Whip of the ANC in 1994. In 1997 he was elected as Deputy Chairman of the National Council of Provinces. Bulelani was also the former National Director of Public Prosecutions. Previously the Executive Chairman of Amabubesi Investments (Proprietary) Limited, he co-founded Vuwa Investments (Proprietary) Limited in 2006. Bulelani currently serves on the Boards of various public and other companies.

Jean Craven


Jean has more than 18 years of experience in building and managing commodity trading businesses at leading South African financial institutions. His commodities business was one of the first active participants in the South African Commodity Futures Exchange and Jean served on the South African Futures Exchange advisory panel for many years.Prior to co-founding Barak with Prieur, Jean built and led a new team at Standard Bank that covered structured commodity finance, physical and derivative trading as well as agricultural and bio-fuel project finance.

Previously, Jean worked for Rand Merchant Bank (of the First Rand Group) heading up a team that completed the world’s first successful one billion US dollar grain securitization. This same team also set up the third largest crop insurance company in Africa to mitigate weather risk on farmer production loans for the First Rand Retail Bank.

Jean holds an accounting degree from the University of Stellenbosch in South Africa.

Founder of Madswimmer


Prieur du Plessis

Prieur is a co-founder of Barak Fund Management and has more than 16 years of experience in the financial services and commodities arena. He managed the treasury operations of Rand Merchant Bank’s (Part of the FirstRand Group Ltd) commodities trading desk, before moving into a structured commodity finance deal-making role at the bank. During his tenure at Rand Merchant Bank, he was part of the team that completed the first successful ZAR 1 billion grain securitisation in the world and he led the team that established the third largest crop insurance company in Africa.

Thereafter he was approached by Absa Bank (A subsidiary of Barclays Bank Plc) to head up the Commodity Finance division. During his time at Absa he was responsible for restructuring the largest agricultural production scheme in South Africa and managing Barclays Africa structured trade and commodity assets as part of the merger. He joined Standard Bank as head of origination for soft commodities in 2007, focusing on developing structured trade and commodity finance products including alternative energy projects. He led the team that was responsible for the launch of a three-year Jatropha finance product, the first bio-fuel finance product of its kind in Africa as well as developing and implementing the first Sharia compliant agricultural commodity backed product for Standard Bank South Africa.

Prieur is a qualified chartered accountant and completed his articles with PricewaterhouseCoopers.



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