Oil & Gas

Customized approach.

Fueling your future in the global economy.

With rising global energy demand, the oil and gas industry has a wide range of challenges and opportunities across the upstream, midstream, downstream and oilfield services sectors. Our global network of experienced professionals work with many of the world’s leading oil and gas companies, fast-growing companies and private equity firms on many highly complex cross-border deals in the global market.


What we do


We help our clients develop actionable strategies for growth. We can seamlessly pull together a worldwide team of consultants and former operators to gain a global and holistic perspective. For our clients in the oil and gas sector, we deploy a broad range of capabilities that address a variety of management issues, including:

  • Corporate strategy: We help translate data-rich activities such as competitive analysis and economic forecasting, market sizing and customer perspectives into actionable and successful strategies.
  • Investment strategy: Finding and prioritizing opportunities to grow is fundamental. We work with our oil and gas clients to understand the strengths and weaknesses in a portfolio of businesses, perform strategic assessments and help them optimize their business portfolios.
  • Transaction evaluation: We help our clients optimize their ROI with our experience assisting in thousands of transactions, helping them with target identification and prioritization, commercial due diligence and divestiture preparation.
  • Value creation: With a critical eye, we work alongside our clients to evaluate current value drivers and opportunities for improvement. Our industry professionals work with client teams in areas such as pricing, sales force effectiveness, cost reduction strategy and post-merger integration.

We provide data-driven insights that help clients build pragmatic strategies that deliver results.


We provide data-driven insights that help clients build pragmatic strategies that deliver results.

  • Corporate clients: Transactions are part of every company’s strategy for growth and maximizing value. Clients considering mergers, acquisitions and divestitures look to us to help them manage capital strategically and execute transactions locally and globally. Be it strict commercial due diligence or M&A strategy, this is part of our core suite of strategic services.
  • Private equity clients: Our deep experience, along with our capabilities assisting clients across the deal life cycle, makes us the advisor of choice in helping companies make the right investments.
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From small to established companies, we address a broad range of strategic challenges.

Broader capabilities

In addition to our EY-Parthenon strategy and transaction services, we have the ability to tap into the broader EY organization to create a winning combination for our oil and gas clients. We can provide a suite of capabilities, from strategy through assistance with implementation, including but not limited to:

  • Operational efficiency assessments
  • Performance improvement advisory
  • IT strategy and implementation advisory
  • Financial systems and processes
  • Financial forecasting
  • Infrastructure planning and capital transformation advice
  • Risk management
  • Tax implications

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Tapping into the global EY organization makes for a winning combination for our clients.

Sector experience

The oil and gas sector covers a broad range of businesses across the value chain. Our clients include:

  • Independent exploration and production companies
  • Oilfield services companies
  • Independent refiners
  • Major integrated corporations
  • National oil companies

From small to established markets, we address a broad range of strategic challenges.

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Our people

Case study: Due diligence for Private Equity firm


One of Parthenon’s private equity firm clients was interested in purchasing a manufacturer of articulating ladders, sold nationally through major hardware and home improvement stores.

Parthenon was tasked with answering the private equity client’s key questions in order to confirm or deny its investment thesis. Those questions included the following:

  • What are the key dynamics of the ladder market, including size, growth and segmentation?
  • What is the competitive landscape of the ladder market and how is it changing?
  • How do the channel and end-users view the product and why do they choose it over other options?
  • What additional growth opportunities exist for the target company?

EY-Parthenon Action

During the six-week engagement, Parthenon used extensive primary and secondary research efforts to determine the product’s position within key retailers as well as its market penetration. Specifically, Parthenon executed interviews with several key constituencies including:

  • Management team members
  • Consumers (ladder owners, articulating ladder owners, and non-ladder owners)
  • Professionals (contractors, electricians, and painters)
  • Retailers buyers, Big Box, franchise hardware, and independent hardware competitors
  • Industry sources


Based on the outcome of Parthenon’s work, the private equity client ultimately decided not to purchase the target company.