Board of Trustees



Mr. Sam Gambrah has over 30 years’ experience with Chevron Corporation, a global Oil and Gas Company with 15 years in U.S. refining downstream, and over 15 years in upstream, Nigeria.

He has held several positions of increasing responsibility and managed several multimillion-dollar projects in his capacity as Project Manager while working for Chevron Nigeria Ltd (CNL). Sam became Director for Nigerian Operations. – and the Escravos Terminal and Technician Training School in the Niger Delta were masterminded by him. They are regarded by many as some of the most successful oil/gas projects in West Africa.

Sam is a native Ghanaian, of the Ashanti Royal Line. In 2015 Sam founded Gamma Group together with Mr. Peter Sharper, a former Commonwealth Business Council Head of Projects & Technologies, in order to help rebuild the troubled economies of Africa.

A dedicated Christian, Sam has guided Gamma Group to create agreements with key State organizations in China, & other strategic international groups in order to empower projects throughout Africa.

The main project fields are:

  1. Agriculture
  2. Oil & Gas
  3. Power Generation
  4. Tourism
  5. Education

Sam is determined to prove that although the oil & gas industry has not always benefited Africa & Africans in general – in the right hands it can empower the regeneration of Africa.



Rev. Tetteh is an ordained Minister and a devoted missionary blessed with outstanding passion and love for the poor and needy in society. He is the founder and president of Rural Outreach and Aid Mission (ROAM) International. His determination and zeal to bring hope to the underprivileged in society culminated in the birth of ROAM. He has traveled the length and breadth of Ghana to identify the problems and situation of the poor. He has preached hope, salvation and baptized many into the fold of Christ.

Besides his call to the work of Christ, he has worked as a public servant with over 20 years of experience in the field of automobile engineering and technical services with the EMS/Ghana Postal Services. His leadership style has helped him bring together young talents to run ROAM.

Rev. Tetteh is the Head Pastor of Action Chapel International (ACI) Ashongman Branch. He is married to Janet for 22 years and they are blessed with four children.



Mrs. Delese Mimi Darko is currently the Acting Deputy Chief Executive responsible for Clinical Trials, Safety Monitoring and regulation of Vaccines & Biological Products at the Food and Drugs Authority (FDA), Ghana.

She is a pharmacist with over 25 years’ experience in the regulation of medicines with respect to clinical trials regulation, marketing authorization and post-approval safety monitoring of medicines.

After graduating from the university, Delese worked first with the then Pharmacy Board for seven years as a drug enforcement officer. Following that she joined the Food and Drugs Board and rose to become the Head of Drug Evaluation and Registration Department, ensuring appropriate systems for regulation of medicines in Ghana.

She has played key leadership roles in the regulation of clinical trials in Africa, resulting in the FDA Ghana, in 2013, to be designated by the NEPAD/AMRH as a Regional Centre for Regulatory Excellence (RCORE) in Clinical Trials and Drug Registration.

Since the establishment of the Food and Drugs Authority, she has mentored her staff to achieve excellence in all areas of professional work. This has helped to ensure business continuity in the field of medicine regulation in Ghana.

She is married with two children.



Charles Amoh is a savvy business strategist and the Base of the Pyramid (BOP) expert. His experience spans across oceans and continents. Charles has worked for many ”fortune 500” companies in the USA, S. Korea, and Ghana for over twenty (20) years.

Some of the companies are GlaxoSmithKline, PPG Industries, SC Johnson, USADF, International Total Management Consulting Limited, S. Korea, Toyota Ghana Company Limited, The Lincoln Consulting Firm, etc. all in the areas of management and leadership.

Presently, Charles is the lead consultant at National Trust Holding Company Limited, Ghana. He is currently a student of Law at the GIMPA, holds an MBA in Marketing, Strategy, and Entrepreneurship from Carnegie Mellon University, USA, MA Population and a BA in Economics and Geography.

Charles Amoh is listed in the USA book of inventors – a cargo storage device – for Ford Motors, USA.