Arnold, John

John K. Arnold




John Arnold is a Partner in the Houston office of Locke Lord LLP where he represents energy companies in a broad range of regulatory and commercial matters, including regulatory compliance and disputes, as well as energy project development and commercial transactions. Well-versed in midstream and electricity issues, John serves clients in related matters before the Railroad Commission of Texas and the Public Utility Commission of Texas.

In addition to many of the largest pipeline companies in the country, John also provides regulatory and commercial guidance to numerous start-up and private equity backed midstream companies throughout Texas and the Southwest. As a former aide to the Texas Attorney General and law clerk to a Texas Supreme Court justice, John provides his energy clients with valuable perspective on the intersection of law, policy, commerce, and politics in the energy business.

Representative Experience

Midstream and Oil and Gas Experience


  • Represent multiple midstream companies in the intrastate oil, gas, NGL, and refined products markets in permitting, compliance, tariff structuring, pipeline safety, and complaint matters
  • Represents oil and gas storage facilities in regulatory compliance matters
  • Represent international midstream company on intrastate portion of multiple bids to deliver natural gas to power plants in Mexico
  • Represent natural gas utilities and pipelines in rate setting proceedings and regulatory matters


  • Counsel midstream companies and producers on gathering, treating, processing, storage, purchase, and transportation agreements
  • Counsel midstream transportation and storage facilities on project development and related transactions
  • Counsel midstream and utility companies on acquisition and divestiture of pipeline assets and companies
  • Counsel midstream companies on right-of-way matters

Electricity Experience


  • Represent the state’s second largest electric utility in regulatory matters before cities and the Public Utility Commission of Texas
  • Represent equity investors in proposal to acquire the state’s largest electric utility out of bankruptcy proceeding
  • Represented affiliate of power generation company in process to build significant electric transmission infrastructure in Texas, and in subsequent rate matters
  • Represent merchant transmission company in regulatory proceedings to expand Texas transmission assets
  • Represent utility’s largest industrial customer in rate proceedings


  • Advise companies regarding retail power contracts
  • Negotiate and execute facilities extension and power supply agreement

Professional History

  • Partner, Locke Lord LLP
  • Law Clerk, Justice Craig T. Enoch, Texas Supreme Court (1999 - 2000)
  • Aide to the Texas Attorney General (1994 - 1996)
  • Campaign Manager, Texas House of Representatives (1993 - 1994)

Professional Affiliations and Recognitions

  • Named to Chambers USA: America’s Leading Lawyers for Business, Energy: State Regulatory and Litigation (Electricity), 2012-2020; (Oil & Gas) (Band 1)
  • Member, Houston Bar Association, Oil, Gas and Mineral Law Section
  • Member, Public Utility Law Section, State Bar of Texas
  • Member, Gulf Coast Power Association
  • Member, Energy Bar Association
  • Member, President’s Board of Visitors, Trinity University