Executive Team



The development of Joule Africa’s power projects is led by the company’s UK team, which is based in London. This team offers strategic advice and executive development services for all of the projects that sit beneath the banner of the Joule Africa Group. In-country support and expertise are offered through national Joule Africa offices in both Sierra Leone and Cameroon.

Joule Africa actively seeks out the best local staff and partnerships with which to work when entering a new country. The intention is that consistent business practices and technical skills are transferred, ensuring that all of its developments benefit from a combination of international and local expertise.


Executive Team

Mark Green

Founder and Executive Chairman

Mark co-founded Joule Africa in 2011 having been working in Sierra Leone since 2008.
As Founder and Executive Chairman of Joule Africa, Mark is responsible for key stakeholder relationships and new project origination, as well as overseeing Joule's 485MW KPEP hydro-electric power project in Cameroon.

Prior to working in Sierra Leone, Mark co-founded a property investment and development company operating in the UK and USA with over $20m of development completed. Previously, Mark worked in the strategy team at Accenture and as the Head of International Business Development for retail financial services conglomerate CPP PLC.

Mark holds a BA Hons in Theology from Birmingham University.

Andrew Cavaghan

Founder and Executive Chairman

Andrew co-founded Joule Africa in 2011, since when he has been leading the development of the 143 MW Bumbuna Phase II hydro-electric power project in Sierra Leone. Andrew has six years hands on experience of infrastructure and power project development, in addition to ten years experience in corporate finance and private equity.

As Founder and Executive Chairman for Joule Africa, Andrew manages the corporate finance aspect of the business and focuses on the longer term business plan for Joule Africa.

Previously, Andrew was a Director at the UK based private equity firm Octopus Investments. He was part of the original investment team whose performance helped increase funds under management from $30m to over $1bn in 2009 when he left. During his time at Octopus, Andrew was responsible for numerous middle market buy-outs, realising an IRR of over 50% over 5 years. Earlier, Andrew was part of the founding team at London Seed Capital, an early stage venture capital fund owned by OneLondon/Greater London Enterprise.

He holds a BA Hons in Philosophy from University College London, and is a qualified Barrister in the UK.

Paul Kunert

Chief Executive

Paul was appointed Chief Executive of Joule Africa in April 2017, having joined the company in September 2016 as Chief Operating Officer. Paul has overall responsibility for the development of Bumbuna II and for the day-to-day management of the business.

Paul has 20 years experience in project finance, of which 17 years has been spent in developing, financing and managing power generation and distribution projects in Africa, with the Commonwealth Development Corporation (now CDC), Actis and Globeleq.

Leading Globeleq’s business development activities in Africa, he saw six projects with a combined capacity of 1GW added to Globeleq’s majority owned and operated asset base over six years, and until 2013 oversaw asset management and operations at all Globeleq’s facilities in Africa.

Paul also lived and worked for four years in Tanzania, as Chief Executive of Songas Limited, an integrated gas-to-power project supplying about one third of the country’s electricity. He led the business to successful completion of construction, an immediate expansion and into commercial operations.

He has led, managed and been involved in development or acquisition of numerous projects in Africa, including in Tanzania, South Africa, Kenya, Uganda, Cote d’Ivoire, Ghana, Cameroon and Nigeria.

Paul is a member of the Institute of Chartered Accountants in England and Wales and holds a BSc (Honours) in Economics and Politics from Bath University.

Howard Shaw

Chief Compliance Officer

Howard joined Joule Africa in March 2017 as its Chief Compliance Officer. Howard has extensive experience in designing, building and embedding governance, ethics and compliance programmes into corporations, including UK Bribery Act compliance programmes. He has over 34 years' experience in financial crime risk management and has worked internationally in both law enforcement and the private sectors.

Howard has served as Head of Anti-Corruption for a mining company and has extensive experience of West Africa, particularly Sierra Leone. Howard has been a member of a number of governance related committees at the British Standards Institution (BSi) and currently chairs the BSi Anti-Bribery Committee. He is the current Chair of the International Standards Organisation (ISO) Technical Committee on Governance.

Ian McNeill

Legal Counsel

Ian advises on the legal and contractual aspects of Joule Africa’s activities. Ian has over 25 years’ experience of advising on energy-related projects and transactions, gained mainly with major energy companies, including Entergy and BG (now part of Shell), and as a partner in leading international law firms.

Ian has worked on the development of independent power projects (CCGT and lignite-fired) in Europe, Southeast Asia and the Indian subcontinent and renewable energy projects (hydro, solar PV and wind) in Africa, the United Kingdom and Southern Europe.  Other experience includes numerous corporate investments, acquisitions, disposals and joint ventures in energy-related and other industries. 

Ian has a degree in law from the University of Aberdeen and postgraduate qualifications in law and finance.

Stelios Vassileou

Head of Finance

Stelios joined Joule Africa in January 2017 as Head of Finance of Joule Africa. His responsibilities encompass the overseeing of all day-to-day financial, and financial governance/good practice, matters for all group companies.

Stelios' previous roles have included Financial Controller (EMEA) for Canadian Solar; Chief Financial Officer for renewable energy business BELECTRIC (UK); Finance Director for the International Hydropower Association; Chief Financial Officer of Empower; and Head of Finance (Africa) for Globeleq.  He has also been General Manager of an AES-owned 332MW hydroelectric plant in Kazakhstan.

Stelios is a Fellow of the Chartered Institute of Management Accountants (FCMA) and the Chartered Global Management Accountant (CGMA). Stelios has a BEng (Hons) in Computer Systems and Electronics from King's College, London.

Gareth Firth

Technical Director

Gareth is the Technical Director for Joule Africa’s developments, overseeing all engineering and project management aspects of the Bumbuna and Kpep projects. His responsibilities encompass managing feasibility studies, EPC tender and contracting, and the subsequent construction phases.

Gareth has over 30 years' experience working on infrastructure projects and was a Senior Partner at international management consultancy PA Consulting Group until 2007. At PA, Gareth was a project manager for capital projects of up to £250 million and worked with many of the world’s leading capital project and infrastructure management organisations to improve their performance. Previously, Gareth spent 12 years as a Civil Engineer with designers Halcrow and constructors Nuttall on dams, tunnels, power plants, highways, and harbours in the UK, Africa, and the Middle East.

Gareth’s work has received awards from the Management Consultancies Association. He is a Chartered Civil Engineer and holds a First Class Degree in Engineering from Cambridge University.

Michael Price

Technical Director

Michael advises on the operations aspects of teh projects underd evelopment, with a specific focus on transmission, interconnection, operations and maintenance.

Previously, Michael served as a Managing Director and board member of China Light and Power, a ~$20bn generation, transmission, and distribution company providing over 20,000 MW of power capacity throughout Asia. At CLP, Michael was responsible for 3,600 staff, annual revenue of $3.2bn, and completion of approximately $660m in capital projects per year. He has managed numerous generation projects, at either a board or operational level, including: the 4,108 MW Castle Peak Power Station (one of the largest coal fired power plants in the world), the 1,968 MW nuclear power plant at Daya Bay (first commercial nuclear facility in mainland China), and the 2,400 MW Guangzhou Pumped Storage Power Station.

Michael is a chartered engineer with a First Class Honours degree in Engineering Science from Oxford University. He also graduated from the Public Utilities Executive Program at Michigan Business School and the Advanced Management Program at Harvard Business School.

Nils Nessioy

Development Director, Cameroon

Nils is overseeing all aspects of the development of the Kpep hydropower project in Cameroon. Nils has extensive African power plant development experience, having previously been Vice President of SN Power’s Agua Imara, where he negotiated share purchase agreements and JV agreements for the acquisition of a majority stake in a power company in Zambia. He was also responsible for negotiating various project agreements including Joint Development Agreements, Power Purchase Agreements and Government Support Agreements.

Nils was previously Chairman of Jacobsen elektro’s Ugandan Power Plant Company, a 50MW HFO plant outside Kampala. Before that, he spent 12 years with Scancem, a subsidiary of Heidelberg Cement, where his roles included Senior Vice President for West Africa and for Southern Africa. 

Nils has been Honorary Consul of the Republic of Niger to Norway since 2002 and was educated at the Norwegian Business School.