Deloitte, Ernst & Young (E&Y), KPMG and
PricewaterhouseCoopers (PwC) have all ranked in the top 10 of
Kennedy Consulting Research & Advisory’s recent Energy
Consulting Marketplace 2009-2012 report.

Deloitte had the largest energy consulting
practice among the Big Four with revenue of $648m. Globally it
ranked second overall.

PwC took the second spot among the accounting
firms with $332m and fifth overall, followed by KPMG with $256m at
seventh overall and E&Y with $236m at eighth overall.

All revenue information is from fiscal year
2008.