About Us

Upstream Partners

We provide independent actionable advice to clients in the oil & gas E&P sector across three core areas: asset development, asset transaction and business consulting.

We undertake technical, commercial and project management assignments, with an integrated capability covering the whole value chain from subsurface to production facilities and export. We balance an integrated perspective with a clear focus on the essence of a problem.

We aim to be trusted advisors that look after our client’s interests, known for our ability to handle both the unusual and the everyday and distinguished by our experience, insight and commitment to excellence.

Our values underpin everything we do.

We deliver on our promises. We work in partnership and close co-operation with your team and within your internal business processes. We commit to providing our clients with what they need, when they need it.

We own our clients’ problems. We are an independent consultancy and our advice is driven by the best interests of our clients. We understand your technical and commercial drivers, and we can offer support and assistance where it matters.

We value our people. Our team provide objective, knowledgeable and robust advice. Our specialists bring expertise in technical, planning and execution services, informed by extensive operator and service company experience.

We go the extra mile. We take a sharp-eyed look to identify opportunities for our clients in even the most ordinary problems. We pride ourselves on our ability to communicate clearly and concisely. We challenge ourselves to exceed expectations. Our focus on what customers want means that we continue to learn, refine and evolve our service proposition.

We demonstrate integrity in all our interactions.


Hiren Sanghrajka

Hiren Sanghrajka, CEO

Hiren has 40 years of experience in the upstream and midstream sectors of the oil and gas industry gained by working on major capital projects with Shell, BP and Marathon Oil. He also has a highly developed services provider perspective having been in a leadership position for a prominent front-end engineering consultancy in London for 16 years.

Hiren has been involved in numerous projects across the whole project lifecycle and has advised many leading international oil and gas companies, national oil companies and financial institutions on various aspects of field development.

Hiren has a BSc (Hons) in Chemical Engineering from Imperial College, London, and is an Associate of the City and Guild Institute, London.

Tom Kelleher

Tom Kelleher, COO

Tom has 35 years of experience in facilities and development engineering, project engineering, and project management, working for major operators in the oil and gas industry. Ten of those years have been in senior management positions.

Tom is skilled in the design and implementation of management processes, systems and organisations. Tom has a broad based knowledge of international E&P activities, with a particular strength in commercial issues. He is an excellent and persuasive communicator.

Tom has a BEng (Hons) in Mechanical Engineering and is a Fellow of the Institution of Mechanical Engineers.

Prabhat Garga

Prabhat Garga, Senior Advisor

Prabhat has over 40 years’ experience in engineering with roles including project manager/director and corporate function leader. He has worked with WS Atkins, John Brown, Marathon Oil, Kvaerner, AMEC, and QinetiQ in the energy, infrastructure, nuclear and defence sectors.

As the corporate head of the project management function at AMEC and QinetiQ, Prabhat was responsible for enhancing capabilities in people, processes and systems.

Prabhat has an MSc in Aeronautical Engineering from Imperial College, London, and is an Associate of the City & Guilds Institute. He is also a Chartered Structural engineer and member of the Institution of Civil Engineers, and the Association for Project Management.

Derek Harwood

Derek Harwood, Senior Advisor

Derek has over 35 years of experience of designing expediting and managing both onshore and offshore oil and gas projects in the UKCS and worldwide. He has undertaken project management roles on BP Clair Ridge Project, Shell Nigeria Bonga FPSO project, Petrobras Roncador project, Conoco/Chevron Britannia Topsides alliance, Shell Nelson & BP Coryton Refinery.

Derek has held senior project management advisory and governance roles across AMEC’s oil & gas projects.

Derek has a BSC in Chemical Engineering from the University of Edinburgh.