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About Leslie

Leslie Kalmbach has extensive experience handling a wide variety of FERC matters, regulations and policies, including Section 7(c) and blanket construction projects under the Natural Gas Act (NGA), compliance filings, rate cases under Section 4 of the NGA, audits and investigations. She has expertise in structuring and interpreting contracts for interstate/Section 311 pipeline transportation services, including precedent agreements, transportation service agreements, interconnection agreements and other contracts related to infrastructure projects for midstream and interstate natural gas pipeline companies. Her contractual experience also extends to negotiating and interpreting contracts for natural gas (and other energy commodities) purchasers and sellers, including but not limited to North American Energy Standards Board (NAESB) form contracts and asset management agreements under FERC Order No. 712, et seq. She is experienced in NAESB compliance matters and has conducted numerous training sessions on many FERC regulatory and compliance topics. Leslie has also represented interstate pipeline companies in matters before the Federal Energy Regulatory Commission, including rate cases, tariff filings, construction and abandonment proceedings, audits and investigations, and compliance filings.


Leslie works with the Louisiana Department of Natural Resources and Office of Conservation statutes, advising clients with respect to regulations and policies.


Leslie has advised large petrochemical manufacturers on matters regarding the procurement of interstate natural gas pipeline transportation service, including pipeline infrastructure construction and contracting. Additionally, Leslie has assisted such clients with agreements to purchase long and short-term supplies of natural gas to be used as feedstock in their operations. She also has extensive experience in negotiating, drafting and interpreting asset management agreements under FERC Order No.712, et seq, covering natural gas supply and transportation. 


Prior to joining the firm, Leslie was Vice President of Regulatory and FERC Compliance for a large midstream entity, overseeing and managing the Rate, Regulatory and FERC Commercial Compliance function for interstate, oil and Section 311/intrastate pipelines, including management and maintenance of FERC Gas Tariffs. She was Vice President of Interstate Contract Administration and FERC Compliance for a large midstream entity, and Vice President of Commercial Support for a large midstream entity. She was also an Assistant General Counsel over Interstate Pipelines for a large midstream entity, as well as a Director in a Shreveport law firm. 



Advises two interstate natural gas pipeline companies on multiple FERC Natural Gas Act Tariff filings, including preparing filings to comply with FERC regulations and changes to rates and terms and conditions of service, and responding to comments and protests with respect thereto.


Advises two interstate natural gas pipeline companies and one intrastate natural gas pipeline company on compliance plans regarding FERC rules and regulations.


Reviews and approves contracts for transportation and storage of natural gas under FERC Natural Gas Act tariffs for two interstate natural gas pipeline companies.


Counsels multiple entities regarding producer/operator deductions from royalty and working interest owner payments for transportation, treating, gathering and processing fees.


Represents petrochemical plant in negotiations regarding natural gas supply acquisition contracts and transportation service agreements on interstate natural gas pipelines, including drafting and revising contracts.


Advises large energy companies with respect to regulatory requirements to construct, own and operate an intrastate natural gas pipeline in Louisiana.


Advises large energy company regarding regulatory requirements for owning, operating and maintaining gathering and processing facilities in the state of Louisiana.

The Best Lawyers in America ©, Shreveport, LA, Energy Law, 2024


Associate Editor, Law Review, Mississippi College School of Law, Juris Doctor

Practice Areas

Mississippi College School of Law, Juris Doctor With Distinction, 1989


Centenary College of Louisiana, Bachelor of Science in Geology, cum laude, 1986 


Bar Affiliations

Louisiana State and Energy Bar Associations


United States District Court for the Western District of Louisiana