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Nossaman LLP

Alan M. Glen


T 512.813.7943
F 512.651.0670
816 Congress Ave., Suite 970
Austin, TX 78701

Alan Glen has widely-recognized expertise in various areas of federal environmental law, including the Endangered Species Act (ESA), the Migratory Bird Treaty Act (MBTA), the Bald and Golden Eagle Protection Act (BGEPA), the Clean Water Act (CWA), the National Environmental Policy Act (NEPA), and the National Historic Preservation Act (NHPA). He also has extensive experience in Texas environmental and land use laws. Mr. Glen represents both public and private entities across the country and has successfully handled dozens of permits and consultations under the ESA and other laws.

Mr. Glen and his team have experience with environmental issues affecting transportation, traditional and renewable energy industries, real estate development, water resources, regional planning, agriculture, and mining. Much of Mr. Glen's practice relates to rare and endangered species. Mr. Glen has testified before the U.S. Senate Subcommittee on Fisheries, Wildlife and Water regarding the ESA's interagency consultation process. He works on numerous endangered species plans and other processes from the scale of individual projects to programmatic plans spanning multiple states. Mr. Glen also handles litigation matters under the ESA and other Federal Environmental laws. Mr. Glen regularly works on conservation banking matters and assisted in establishing the first species conservation bank in the southwestern region of the U.S. Fish and Wildlife Service.

Mr. Glen served as Vice-Chairman for the steering committee of the Balcones Canyonlands Conservation Plan, a regional habitat conservation plan (HCP) in Central Texas, and was a member of the Recovery Team for the Barton Springs salamander. He received the President’s Award from the Texas Capitol Area Builders Association (2000). He was a member of the Board of Directors of Homebuilders Association of Greater Austin (2002-2003). Mr. Glen was also President of the Board of Directors of the Real Estate Council of Austin (1997) and received the Council’s “Distinguished Contribution Award” in 1996. He also served for several years as Vice Chairperson of the Advisory Council of the Lady Bird Johnson Wildflower Center, a unit of the University of Texas at Austin.

Mr. Glen is a frequent speaker on environmental matters and has chaired the Texas Endangered Species Act, Wind Energy, and National Environmental Policy Act conferences for CLE International. He has also been a guest lecturer at a United States Fish and Wildlife Service National Training Course on conserving endangered species on private lands. He has written a number of articles and papers on Endangered Species Act matters.

Mr. Glen was a Research Editor for the Texas Law Review during his time at the University of Texas School of Law. Immediately after law school, he served as a law clerk to the Honorable Homer Thornberry, Judge, United States 5th Circuit Court of Appeals.

Representative Work

  • Energy and Wildlife Action Coalition (EWAC). Mr. Glen serves as lead counsel for this trade association of electric utilities, including renewable energy providers.
  • Texas Department of Transportation (TxDOT).  Representing the Texas Department of Transportation as outside environmental counsel on complex environmental matters for TxDOT infrastructure projects.  
  • Oil and Gas Pipelines. Mr. Glen advises several of the largest U.S. oil and gas pipeline operators on a variety of environmental issues affecting both inter-state and intra-state pipeline construction and development.
  • Williamson County Road and Highway Work.  Since 2000, Mr. Glen has served as outside environmental counsel to Williamson County, Texas. This has involved over $1 billion in critically needed roads and highways.
  • City of Austin Water Treatment Plant Four.  Successfully represented the City of Austin on environmental issues affecting the largest infrastructure project in the City's history at that time. 
  • Lower Colorado River Authority Electric Transmission Lines.  Provides environmental advice on various environmental compliance issues affecting the LCRA’s plans and operations.
  • City Public Service.  Advises municipally-owned utility on ESA compliance issues.
  • San Antonio Water System.  Advises municipal water utility on ESA compliance issues.
  • Transmission Companies.  Assists a private transmission company with regards to ESA and CWA compliance issues related to state-mandated Competitive Renewable Energy Zone transmission lines in the Texas panhandle.
  • Private Development Company.  Assisted in all environmental aspects of the largest master planned project in the history of San Antonio. This included obtaining an HCP/Incidental Take Permit under the ESA and successfully defending that permit in a federal court suit brought by Center for Biological Diversity.
  • Private Development Company.  Handled complex CWA and ESA permitting and ongoing compliance issues for this marina community on the Texas Gulf coast.
  • Conservation Banking.  Mr. Glen has been a leader in the development of species conservation banks in Texas and elsewhere. He assisted in developing the first conservation bank in Region 2 of the U.S. Fish and Wildlife Service and in developing the first multi-state programmatic conservation bank in the country.

Awards & Honors

Named an Energy and Environmental Trailblazer by National Law Journal for 2018
Best Lawyers in America, 2008-2017
Named one of the top five environmental lawyers in Texas in the Texas Lawyer “Go to Guide” in 2002
Selected to the Super Lawyers List for 2004-2007 and 2010-2015 

Alan M. Glen
Alan M. Glen



J.D., University of Texas School of Law, 1984, with honors

A.B., Stanford University, 1981



U.S. District Court, Eastern District of Oklahoma

U.S. District Court, Western District of Texas

Professional Affiliations

American Bar Association, Section of Environment, Energy and Natural Resources
State Bar of Texas Environmental and Real Estate Sections

Awards & Honors

Named an Energy and Environmental Trailblazer by National Law Journal for 2018
Best Lawyers in America, 2008-2017
Named one of the top five environmental lawyers in Texas in the Texas Lawyer “Go to Guide” in 2002
Selected to the Super Lawyers List for 2004-2007 and 2010-2015 

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