CES RENEWABLE - Key Persons


Aaron Ashcraft

Job Titles:
  • GM of Preventative Maintenance Services
Aaron has 20+ years of experience in traditional and clean energy sectors covering a variety of roles, including CEO and senior operating positions. He oversaw all aspects of large-scale infra projects, including operations, compliance, and finance.

Ahmad Atwan - CEO, Founder

Job Titles:
  • Chief Executive Officer
  • Co - Founder
Ahmad brings 20+ years of experience founding, building, and investing in energy companies, including renewables, energy infrastructure, and energy services. He previously founded and successfully sold several energy software and services as well as renewables companies at a significant profit. He also spent over a decade leading energy private equity investing at BlackRock and energy infrastructure investing at Morgan Stanley.

Charles McConnell

Job Titles:
  • Senior Advisor
  • Executive Director of Carbon Management at the University of Houston
Charles has held senior executive and leadership roles in the private and public sector including with the Department of Energy, Praxair, and Battelle. He has served as a Presidential appointee as Assistant Secretary of Energy - Office of Fossil Fuels under President Obama. He has achieved worldwide recognition in the development and advocacy of climate change and carbon policies, e.g., Carbon Capture Utilization and Storage (CCUS), 45Q CCUS/EOR policy, etc.

Constantine Triantafyllides - COO

Job Titles:
  • Chief Operating Officer
Constantine has extensive energy services field project management and investment banking experience. As a field Project Manager, he managed $60M annual site P&L and 20+ different contracted services daily along with drilling operations, supply chain logistics, and procurement activities in the Permian Basin in West Texas.

Darren Espey

Job Titles:
  • Senior Vice President of Operations
Darren has 25+ years of experience across the full energy value chain, renewables, marketing, producer services, midstream development, and minerals management. Realized three monetization events totaling $3.5Bn in enterprise value.

Dimitri Spiliotis

Job Titles:
  • Member of the Board of Directors
  • Partner With Partners in Performance
Dimitri has 10 years with Partners in Performance leading operational improvement engagements with measurable impact for clients in the mining & metals, construction, and pulp & paper industries, among others. He has made improvements in the areas of production throughput, cost reduction, organizational design, and capital project optimization and delivery. He has served in various functional leadership roles including head of strategy, procurement, logistics, and marketing for Lafarge Gypsum business units.

Drew Philpot

Job Titles:
  • Senior Advisor
  • CEO, Blended Power
Drew is a solar project development expert with a successful track record in project finance, development, real estate acquisition, M&A, due diligence, and energy storage development. He has 6+ years of experience leading First Solar's project development growth and execution in the Southeast US. Managing 2.5 GW utility-scale solar development portfolio in Alabama, Florida, and Georgia Drew developed 1 GW of contracted projects and transacted 1.5 GW of M&A deals under MIPSAs or APAs.

Gerrit van Doornik

Job Titles:
  • President - Wind Solutions
Gerrit is formerly the VP of the Gulf Coast & Mexico for Mammoet (the world's largest crane company). Where he successfully launched up tower wind tech business by managing a staff of 100, 30 cranes, and 7 barges simultaneously on multiple projects. There he grew Mammoet Gulf Coast region from $40 M to $60 M annual revenue in <2 years. He also spent 4+ yrs with BP - Naval architect in offshore construction.

Halton Peters

Job Titles:
  • Co - Founder, Chairman, and President of Hardee Fresh
Halton leads Hardee Fresh, an indoor vertical farming business that grows and sells organic leafy greens produce. He was previously a founding investor and COO of a microgrid development and technology company that was sold to Shell. He is also the Chairman and President of FRII Technology Solutions, a diversified IT managed services, networking, and automation controls company.

Harper Jones

Job Titles:
  • President, Energy Storage Services
Harper is one of the most experienced energy storage professionals in the O&M field. Harper's leadership and work ethic were honed during his time in the U.S. Navy. He has extensive field service experience with AES prior to and following the creation of Fluence with Siemens. His leadership experience across the spectrum of asset operations and maintenance in standalone energy storage comes from his most recent role managing all O&M activities for Key Capture Energy.

James C. Pappas

Job Titles:
  • Member of the Board of Directors
  • Founder & Managing Member JCP Investment Management
Throughout James' career, he has concentrated much of his efforts in the restaurant, food, and retail business sectors and possesses a thorough understanding of restaurant and food businesses in addition to his expertise in corporate finance. He served as a director of US Geothermal, Inc., a leading and profitable geothermal energy company focused on the development, production, and sale of electricity from geothermal energy. He currently also serves as Secretary for the Endowment Advisory Board of the Annunciation Greek Orthodox Church in Houston and on the Methodist Hospital Gastro Division's Advisory Board in Houston. He received a BBA in Information Technology and a Master of Finance from Texas A&M University.

Jon Morgan - CTO

Job Titles:
  • Chief Technology Officer
Jon brings 10+ years of experience across high technology launching products from robotics & autonomous vehicles to cyber security software. He operated a third Generation E&P Family business having worked across all business & process roles.

Julietta Palyan

Job Titles:
  • Controller
Julietta began her career in accounting as an Academic Advisor for the University of Houston. There her passion for accounting grew until she sought out greater challenges in the private sector with PricewaterhouseCoopers. She would go on to work for direct clients like Targa Resources before turning her attention toward the future of the energy sector. Today she manages the back office of Clean Energy Services as Controller.

Kay McCall

Job Titles:
  • Member of the Board of Directors
Kay most recently was appointed as a board member of EDP Renewables, one of the largest renewable energy developers and operators in the world. She previously served as President, CEO, and board member of Noble Environmental Power, a large private equity-backed wind energy company that developed, financed, and operated wind projects. She led the company to a successful exit to The Carlyle Group in 2018. She previously served as a member of the leadership team at GE, where she was entrusted with addressing global governance issues Recently launched leading non-profit renewable energy trade association, the Renewable Energy Alliance - Houston. She is also a member of the Board of Advisors for the University of Houston Bauer College.

Kevin Doffing - Chief Commercial Officer

Job Titles:
  • Chief Commercial Officer
Kevin brings prior experience leading sales and marketing for a renewable energy field services company. He has 15+ years of P&L experience as the President of an oilfield supply company. He co-founded Houston's first renewable energy trade group the Renewable Energy Alliance. He is a US Army combat veteran with extensive O&M and logistics experience on complex combat machinery. He has served in various advisory roles with energy transition startups as well as an Executive in Residence with Rice University's Clean Energy Accelerator.

Kevin Walsh

Job Titles:
  • Member of the Board of Directors
Prior to establishing his consultancy business in 2019, Mr Walsh was Managing Director and Head of U.S. Renewable Energy at GE Energy Financial Services (GE-EFS) from 2006-2019 where he led the team that invested $1 -2 billion annually in renewable energy projects. Under Mr Walsh's leadership, GE EFS successfully invested $16 billion in renewable energy projects globally with the capacity to generate 16+ gigawatts of power, primarily from wind (onshore and offshore) and solar power but also hydro, geothermal and biomass. Investments vehicles included cash equity, tax equity, development capital, structured equity, construction loans, term loans, JVs, etc. Notable transactions that Mr Walsh and his team led include: 550MW Desert Sunlight solar, 845MW Shepherds Flat wind, 760MW Enel JV, 231MW Kuni Umi Japan Solar, 30MW Block Island Offshore wind, 196MW Toba Montrose hydro in Canada and over 2GW of wind repowerings with various parties including Nextera and Leeward. Mr Walsh has also been active on various policy matters supporting the renewable energy industry including US tax reform, PTC/ITC renewal and US Treasury/IRS Guidance for new and repowered wind. Mr. Walsh was a member of the Board Directors of the American Council on Renewable Energy (ACORE) from 2016-2019 and it's Board Treasurer during 2018. He is currently a Board member emeritus of ACORE. He has been a member of the Policy Committee of the American Wind Energy Association, and served on the Board of Directors of the Solar Energy Industries Association. He also served as a member of the Board of Directors of the Connecticut Greenbank from 2017-2021. In prior roles Mr. Walsh led Power and Renewable Energy investing at GE-EFS and was responsible for the management of its $20 billion global portfolio of energy investments, as well as related portfolio sales and reinvestment. He also led energy venture investing for GE-EFS from 2007-2011. Since joining the predecessor of GE-EFS Financial Services, GE Structured Finance, in 1990, Mr. Walsh held various GE leadership positions in GE Capital Markets, GE Trading, GE Corp and GE Aviation. Mr. Walsh graduated cum laude from Fairfield University, where he received a bachelor's degree in business management and where he currently serves on the Advisory Council at the Dolan School of Business. He is a graduate of General Electric's Financial Management Program. Mr Walsh was also a member of the Board of Directors of the Kennedy Center in Trumbull CT from 2014-2020. Mr Walsh lives in Fairfield CT and Juno Beach FL with his wife Sandy. They have two married sons. Mr Walsh enjoys golf, skiing and is a 20+ year participant in the PanMass Challenge, an annual two-day, 192 mile bike ride in support of the Dana Farber Cancer Institute.

Marcos Ramos

Job Titles:
  • Senior Project Manager
Marcos is a process-driven leader with a decade of project management experience across various industrial segments. He brings a great attitude and desire to learn into the CES team.

Neil Bush - CEO

Job Titles:
  • CEO
  • Senior Advisor
  • CEO, Neil Bush Global Advisers
Niel has been ivolved with international business development for four decades operating through Neil Bush Global Advisers. He has a deep network with institutional investors across Asia Currently serves as Chairman of Singhaiyi, a Singapore listed real estate company investing in the United States. He also acts as Co-Chairman of CIIC, a Beijing- based real estate development company.