Proven Operational Track Record

Veteran Led. Decades of Proven Execution.

Horizon’s leadership unites multiple decades of energy exploration, public company turnarounds, and $4.5B+ in completed corporate transactions.

• Multiple Decades of Experience• $4.5B+ Divestments & M&A• 500 Bcf Gas Discovered• U.S. Military Veteran Leadership
Executive Leadership & Board of Directors

The Executive Officers

Jonathan Rudney

Jonathan Rudney

Executive Chairman & Director
Years of Experience
45+ Years
Strategic Focus
Domestic & International Upstream Exploration, Capital Strategy, Governance

An energy executive and entrepreneur with extensive domestic and international oil and gas exploration and development experience. As Executive Chairman and Director of Horizon Energy Global Corporation, he brings decades of expertise in management, finance, exploration, operations, corporate governance and vision to the company’s energy transition strategy. His career spans management, finance, exploration, development and operational leadership, with a focus on domestic and international markets, both offshore and onshore.

Key Historical Achievements

  • Founded two exploration companies: Established Century Offshore Management Corporation and Century Exploration International, Inc.
  • Delivered substantial discoveries: His companies discovered more than 50 million barrels of oil and 500 billion cubic feet of natural gas, generating cumulative net revenues exceeding $1 billion.
  • Built successful industry partnerships: Developed and managed offshore Gulf of Mexico and international joint ventures.
  • Developed energy finance structures: At the forefront of developing new energy finance structures including energy derivatives and volumetric production payments.
Stephen Brunner

Stephen Brunner

Chief Executive Officer & Director
Years of Experience
45+ Years
Strategic Focus
Corporate Energy Leadership, Petroleum Engineering, Public M&A

An energy executive, petroleum engineer and board director with extensive domestic and international experience. As Chief Executive Officer and Director of Horizon Energy Global Corporation, he brings extensive expertise in exploration, operations, mergers and acquisitions, and corporate restructuring to the company’s energy transition strategy. His career combines technical leadership with experience managing public companies and executing major transactions.

Key Historical Achievements

  • Executed major corporate transactions: Managed and successfully divested two NYSE-listed oil and gas companies, including a $3.5 billion sale and a merger into a larger public company.
  • Led a publicly traded energy company: Appointed President and Chief Executive Officer of Constellation Energy Partners in 2008 after initially joining as Chief Operating Officer.
  • Directed international operations: As Executive Vice President of Operations at Pogo Producing Company, oversaw exploration, production, acquisitions and divestitures across seven business units in the United States, Canada, New Zealand and Vietnam.
  • Shaped Horizon’s investment strategy: Helped develop the company’s coordinated capital strategy across carbon capture and storage, geothermal cooling and water management, and UK natural gas opportunities.
Marc Thomas

Marc Thomas

President, Chief Operating Officer & Director
Years of Experience
30+ Years
Strategic Focus
Operational Turnarounds, Hyperscale Infrastructure Strategy, Commercial Offtake

A business executive, board director and U.S. Army Special Forces veteran with extensive knowledge and experience in operational turnarounds, strategic management and organizational leadership. As President, Chief Operating Officer and Director of Horizon Energy Global Corporation, he brings experience from the U.S. Executive and Legislative branches of government, General Electric, McKinsey & Company and other public / private companies to advancing energy transition and industrial infrastructure opportunities.

Key Historical Achievements

  • Delivered a major business turnaround: As Chairman, President and CEO of GE Aviation Materials, implemented a strategy that increased annual sales from $151 million to $246 million and operating profit from $9 million to $42 million, a 63% and 467% increase, respectively.
  • Earned recognition for measurable results: Helped generate more than $500 million in revenues and savings during his GE career and received the GE Latimer Award for Leadership and Lean Six Sigma Excellence.
  • Developed international energy strategy: At McKinsey & Company, helped develop business strategy for a $1 billion international LNG company, building experience relevant to Horizon’s energy businesses.
  • Led in military and public service: Served as a U.S. Army Special Forces Detachment Commander, taught engineering management at West Point and a former President of the White House Fellows Foundation & Association.
Graham Heard

Graham Heard

Chief Operating Officer – UK
Years of Experience
50+ Years
Strategic Focus
North Sea Subsurface Exploration, UKCS Licensing, Southern Basin Geology

A petroleum geologist and energy executive with a variety of international exploration and development experience, including extensive work in the North Sea. As Chief Operating Officer–UK for Horizon Energy Global Corporation, he brings expertise in subsurface evaluation, exploration strategy and technical leadership to the company’s UK natural gas program. He is a Chartered Geologist, Fellow of the Geological Society of London and former Chairman of the Petroleum Exploration Society of Great Britain.

Key Historical Achievements

  • Led exploration and technical evaluation: Served as Exploration and Technical Director of Northern Petroleum, overseeing technical work supporting international exploration and development activities.
  • Earned industry recognition: Chaired the Petroleum Exploration Society of Great Britain in 1991 and was recognized as a “Diamond Legend” during the society’s 2024 anniversary celebrations.
  • Helped establish a major industry forum: Served as a founding director of PETEX and helped organize its early conferences, promoting new technologies and knowledge sharing in petroleum exploration.
  • Directs Horizon’s North Sea technical program: Has led the company’s UK technical team since 2020 and serves as technical lead for the Dabinett Prospect.
Troy Carson

Troy Carson

Chief Financial Officer
Years of Experience
25+ Years
Strategic Focus
Capital Markets, Debt Syndication, Corporate Finance, Enterprise ERP

A finance executive with deep knowledge and experience in energy and industrial businesses, spanning public-company accounting, corporate finance, capital markets and restructuring. As Chief Financial Officer of Horizon Energy Global Corporation, he brings experience from both public and privately held companies to support capital planning, financial controls and investment decisions for the company’s energy and infrastructure projects.

Key Historical Achievements

  • Advanced to public-company financial leadership: Served as Senior Vice President and Chief Financial Officer of Hercules Offshore after holding senior accounting and controller positions.
  • Earned a broad CFO mandate: Appointed Chief Financial Officer of Hoover Ferguson in 2017, with responsibility for finance, strategic planning, transaction analysis, investor relations and private and institutional financing.
  • Participated in complex corporate restructuring: Served as a senior financial executive during Hercules Offshore’s restructuring and executed restructuring agreements on behalf of multiple subsidiaries.
  • Supports Horizon’s capital and investment strategy: Provides oversight of capital allocation and strategic investment analysis, drawing on experience in debt syndication, private placements and financial systems.
Technical Governance

Advisory Board & Specialized Counsel

World-class independent legal, regulatory, thermodynamic, and reservoir certification partners validating Horizon’s project execution across all three pillars.

Regulatory & Environmental Law

EPA Class VI & UIC Counsel

Premier environmental regulatory attorneys overseeing EPA Class VI and Class V permit filings, pore space leasing, and 45Q transfer structures.

Scope of Advisory & Oversight
EPA Class VI UIC geologic sequestration permits
Pore space leasing & surface access agreements
Section 45Q direct pay and transferability structures
Thermodynamics & Geo-Exchange

Geothermal Subsurface Geophysicists

Specialists in sedimentary basin thermodynamics, closed-loop geo-exchange arrays, and data center thermal dissipation modeling.

Scope of Advisory & Oversight
Closed-loop saline aquifer heat sink modeling
Hyperscale AI compute heat rejection simulation
Thermal plume dissipation and water balance mitigation
Subsurface Certification & Modeling

Senior Reservoir Engineering Consultants

Independent reservoir certification engineers conducting Class VI plume simulations and prospective resource evaluations for Dabinett.

Scope of Advisory & Oversight
Independent Competent Person's Reports (CPR)
Class VI CO₂ dynamic plume pressure simulations
UKCS Southern Gas Basin reservoir characterization