David Alexander Johnston

WellDynamics International Ltd. provides completion technology to the oil industry. The company is headquartered in Dyce, the United Kingdom.

Part of Halliburton Co., Landmark Eame Ltd. develops software for the oil and gas industry. The company is based in London, UK and was founded in 1985.

Part of Halliburton Co., Halliburton Energy Services Ltd. is an investment holding British company. The company is based in Dyce, UK and was founded in 2002.

Part of Halliburton Co., Halliburton Ltd. engages in drilling, formation, evaluation and well construction of oilfields. The company is based in London, UK.

Part of Halliburton Co., Baroid Ltd. is an investment holding British company. The company is based in London, UK. Baroid was founded in 1965.

Part of Halliburton Co., Petroleum Manufacturing Services Ltd. is a British company that provides business support services. The company is based in Dyce, UK.

Part of Halliburton Co., Neftex Petroleum Consultants Ltd. is a British company that provides geosciences consultancy and develops products and services to support the resource exploration industries. The company is based in London, UK. The company was founded in 2001. Neftex Petroleum Consultants was acquired by Halliburton Co. on June 13, 2014.

Part of Halliburton Co., Mediterranean Energy Services Ltd. is a British company that provides support services for the oil and gas industry. The company is based in Dyce, UK and was founded in 2002.

Smart Fibres Ltd. provides optical fiber sensor solutions for component testing, design validation and structural health monitoring. Its services include initial consultancy, sensing system supply, installation, commissioning and training. The company was founded in 1995 and is headquartered in Bracknell, UK.