About John Clegg
John Clegg is CTO and director at Hephae Energy Technology.
John Clegg first appears on SEC filings in 2024.
Experience
This experience comes from John Clegg's profile and from SEC filings. For roles taken from filings, the years are when the filings name John Clegg in the role, so the role may have started earlier or lasted longer.
DL
Digital Transit Limited Current
Non Executive Director
2023 – Present
SA
STEM Ambassadors Current
STEM Ambassador
2022 – Present
Hephae Energy Technology Corp Current
President and Chief Technology Officer (2021 – Present)
Director
2021 – Present · Spring, TX
Hephae develops high-temperature drilling equipment for geothermal energy projects.
JO
johnmclegg Current
Director
2020 – Present
PI
Project InnerSpace
R&D Analyst
2023 – 2025
BU
Birmingham City University
Visiting Lecturer
2023 – 2025
WE
Weatherford
Director, Digitalization and Automation Domain
2016 – 2020
AT
APS Technology
Senior VP, Products and Engineering
2014 – 2016
UP
Ulterra Drilling Technologies L.P.
Senior Vice President of International Operations
2010 – 2013
NV
National Oilwell Varco
Director, Materials Technology, Downhole
2005 – 2010
RL
Redcliffe Limited
Operations Director
2003 – 2004
AS
ABB Offshore Systems
Head of Projects
2000 – 2002
SC
Schlumberger
Product Center Manager, General Manager, Chief Engineer
1986 – 2000
Key Colleagues at Startups
The people John Clegg works with at each company, as listed on that company's latest Form D.
Hephae Energy Technology Corp · Form D, Jul 17, 2026
JE
Jeffrey Engelman
Director
TK
Torsten Kolind
Director
TL
Tove Lilliestierna
Director
SK
Steve Krase
CEO and director
JW
Julia Wright
Director