Please leave your details below
and we will be in touch shortly

*Mandatory fields
Giant Capital collect and store the personal data of the individuals who contact us.

Your personal data may be used for a range of marketing activities. If you agree to your personal data being processed for this purpose, please indicate which channels you would like to receive information through by ticking the corresponding boxes below.

Under the terms of GDPR you do have the right to object to the use of your data for this purpose by leaving all boxes unticked. Please note, should you choose to object, you will still receive information related to your query.


Our Team

Our team brings together a unique mix of skills and experience, combining world-class sub-surface engineering expertise with financial, strategic, operational and legal know-how.

We specialise in bringing together capital with upstream talent and are always looking to work in true partnership with best-in-class operators who need support and investment to realise their upstream oil and gas appraisal and development projects.

By combining our technical and commercial analysis for rigorous company valuation, we can help provide capital for high quality, under valued companies.


Andrew Sinclair, Commercial Lead

Andrew has extensive principal investment experience in global upstream oil and gas, gained during a career which has seen him co-found and lead the London office for the oil and gas investment division of Macquarie Bank. He has particular expertise in transaction execution, financial modelling and structuring investments and excels in identifying attractive projects and evaluating the commercial potential of assets.


T US +1 713 502 6499

T Australia +61 431 602 305

Thomas Wagenhofer, Technical Lead

Thomas is a highly respected and experienced petroleum engineer and oil and gas evaluation specialist. He is particularly skilled in analysing and evaluating all technical aspects associated with oil and gas production, turning sub-surface data into cogent cash flow data for dependable, repeatable company valuation.


T US +1 281 818 5504

T UK +44 7403 878 879

Strategic partnerships

We have partnered with specialist Australian alternative manager, Longreach Alternatives, to create Longreach Energy, which we manage. This offers Australian investors access to the US domestic oil and gas industry, through a proven investment strategy.



We have business development, technical and portfolio services teams in Houston and Tulsa, staffed by local experts.

In addition, we have investor offices in London and Sydney.

  • Investment and Operations
  • Investor offices
Our Locations

1800 Bering Street
Suite 510
Houston, TX 77057

Andrew Sinclair
+1 721 502 6499

Thomas Wagenhofer
+1 713 280 8062

Arrow Portfolio Services Company
721 W. Queens Street
Broken Arrow, 74012

Rita Whittington
+ 1 918 409 9839

Longreach Energy
Level 13,
1 Margaret Street,
NSW 2000

Andrew Sinclair
+61 431 602 305

Giant Capital Management
16 Woodside Road
TN13 3HE

Thomas Wagenhofer
+44 7403 878 879