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Stewart Dalby is a journalist, travel writer, novelist and internet publisher. His long career in journalism was mainly at the Financial Times where he was a company and financial reporter, a war correspondent, foreign correspondent, a foreign news editor and a travel writer.

He has also written for the Observer, the Guardian, the Sunday Telegraph. The Economist, the Spectator, the New Statesman, the Investors Chronicle, the Far Eastern Economic Review and the Boston Globe in the US.

On ceasing to write full time for these publications as founding editor and director he set up which became the most successful platform and conference business in Europe for investors in small cap and mid-tier oil and gas companies.

He is now joint editor and publisher of

He is Chairman of the Friends Wormwood Scrubs a charity aimed at maintaining the 67 hectare common behind the famous prison as more ‘wild than tamed’ and conserving this unique London greenspace against the imprecations of developers.

He is a founder member of Frontline Club and is Fellow of the Royal Geographical Society.

Martin Clark is a freelance journalist, editor and publisher who has written widely across the energy industry for over 25 years. He was a former news and features writer for for many years, working alongside Greenbarrel publisher Stewart Dalby and the rest of the team.

He has had work published in the national press and many leading industry titles, including Euromoney Petroleum Economist, FT Energy/Platts African Energy, Informa Lloyd’s List and others. He also previously served as editor of Middle East Oil & Gas Monitor (Newsbase) and Frontier Energy magazine (Renaissance Media), and was editor/publisher of Africa Electra, a fortnightly journal covering the electricity industry in Africa. 

Martin also has a strong track record in PR and copywriting, working with clients ranging from oil giants (BP) to exploration juniors (Equator Exploration), as well as trade and development finance institutions including UK Export Finance and the Islamic Development Bank.

Barney Smith was  a British diplomat for over 35 years. In that capacity he worked on, and  served in, Thailand, South Asia and various countries in the EU. On retirement from Government employment in 2004, he wrote articles and book reviews for He (and his wife) set up the Oilbarrel conferences, which he chaired. In 2006 he joined  the board of Coastal Energy, an oil and gas company with all its acreage in Thailand. More recently, he served as chairman of Coastal until it was successfully sold in 2014.

He has a degree in classics from the University of Oxford. In the early 1980s, he spent a year at the French Ecole Nationale d’Administration (ENA). He now writes for Greenbarrel on  renewable/alternative energy, as well as keeping his hand in with oil and gas.

Julian Singer worked for 50 years in the oil industry making and interpreting measurements of subsurface rocks and fluids, as well as being involved in research into and design of new measurement devices. During this time he was employed by the oilfield service company Schlumberger and worked in Australia, Europe, West Asia, India, and North and South America. He subsequently returned to the UK and joined Sondex, another oilfield company, which was acquired by General Electric.

He has a degree in physics from the University of Oxford and is a co-author of the book Well Logging for Earth Scientists. He now writes for Greenbarrel on energy, both renewable and oil and gas.