Acoustic Data is the global leader in real-time wireless downhole monitoring solutions, headquartered in Woking, United Kingdom. The company’s proprietary SonicGauge™ uses two-way (duplex) acoustic telemetry to transmit real-time high-frequency downhole data to surface across the entire well lifecycle, including multi-year applications. The technology has primarily been deployed for monitoring subsurface energy storage, hydrocarbon production, injection and observation wells, and verifying the integrity of downhole barriers.

The company is backed by Energy Growth Momentum, a London-based private equity fund, and Alturki Ventures, the venture capital arm of Alturki Holding from the Kingdom of Saudi Arabia.


Mike Mannering

Mike is an experienced Chairman and Director with over 40 years in oil & gas exploration and production. He held many senior corporate positions within Schlumberger, including President of Rig Management, responsible for rigs contracted by IPM and for equity participation in rig joint ventures, and is currently a Director of the Arabian Drilling Company. Additionally, he was the Director of Songa Offshore, advisor to several Private Equity funds, and Chairman and Investor in Navetas Energy Management until its sale in 2017. He is a British citizen who resides in the U.K.

John Wilson
Investor Director

John is a growth capital investor, investing in high-growth private companies in the energy sector. He is a founding member of Energy Growth Momentum LLP and holds several non-executive roles in operating companies. Prior to EGM, he worked at Simmons & Company and Lime Rock Partners, where he played a key role in analyzing and monitoring oilfield service and E&P investment opportunities internationally. He holds a MA Joint Honours in Economics and International Relations and a Corporate Finance Diploma from ICAEW and CISI.


Mark Tolley
Chief Executive Officer | Co-Founder | Director

Mark is an Australian Petroleum Engineer who has over 35 years of global experience in oil & gas exploration and production. He envisioned the SonicGauge™ System in the early 1990s and guided it to a technical reality in recent years. He is experienced in financial markets, investor relations, general management, project and production operations management, production technology, reservoir engineering, and well site operations. He has particular experience in the CIS and is fluent in the Russian language.

Jesse Tolley
Chief Commercial Officer | Co-Founder | Director

Jesse is a New Zealand citizen with over 15 years of global experience in oilfield services and investment banking. Co-founding Acoustic Data in 2012, he has led all of the company’s commercial efforts, such as capital raising (US$10M+), financial planning, sales and marketing, partner channel development and personnel recruitment. He holds a Bachelor of Commerce in Finance from the University of Canterbury. He has particular experience in Asia-Pacific and Latin America and is fluent in the Spanish language.

Guy Mason
Chief Technology Officer

Guy is a British citizen with 30 years of experience in oil & gas sensors and instrumentation for both drilling and production. Prior to joining Acoustic Data, he was a Technical Director for Baker Hughes, GE (formerly Sondex), where he spent 17 years bringing new products to market. He graduated from Oxford University with a degree in Physics before joining Schlumberger Wireline & Testing. He has worked extensively in MENA and LATAM and holds numerous patents.

Matthew Norgate
Chief Operating Officer

Matthew is a British citizen with over 20 years of global experience in the oil and gas industry; primarily focused on downhole data acquisition and sensors. Prior to joining Acoustic Data, he worked for Baker Hughes, GE where he held several senior operational, commercial and product management roles within their Wireline businesses. He has a degree in Mechanical Engineering with a Modern Language (French) from the University of Sheffield and an MBA from Imperial College.


Stephen Murphy
Global Sales Director

Stephen is a British citizen with over 20 years of experience across multiple disciplines within the oil & gas industry. He has worked globally in several sales, operations, and country management roles for major oilfield service companies such as Schlumberger, Weatherford and Baker Hughes, a GE company. Prior to joining Acoustic Data, he was the Global Sales Director for Expro North Sea where he managed global product line sales and achieved significant growth in key markets such as MENA.

David Martins Cruz
Technical Sales Manager

David is a Venezuelan and Spanish citizen with over 15 years of experience in oil & gas artificial lift systems and reservoir monitoring. Prior to joining Acoustic Data, he worked in several sales and operational roles at Schlumberger throughout Latin America. He has a degree in Mechanical Engineering from the Universidad Simon Bolivar, an MSc in Unconventional Well Design from Instituto Tecnológico de Buenos Aires, and an MBA from I.E. Business School. He is fluent in the English and Spanish languages.