Walter brings over thirty-five years of experience providing representation, advice and counsel to businesses and individuals in their dealings with Indian tribes and public land management agencies, like the U.S. Bureau of Land Management, the U.S. Forest Service and New Mexico State Land Office. Walter's practice is focused on natural resources, energy and environmental law.

Clients throughout the west and across the country seek Walter's advice in matters involving transactions, disputes and consultations with Indian tribes and other Native American groups. In addition, clients look to Walter when pursuing federal lands leasing, development, and related permitting and environmental compliance efforts under the National Environmental Policy Act ("NEPA"), Section 106 of the National Historic Preservation Act, the Endangered Species Act, and related federal statutes.

Walter also is actively involved in community and professional non-profit organizations. He has served as President of the Rocky Mountain Mineral Law Foundation, a world-class continuing education provider for professionals working in the areas of natural resources development and environmental law. In addition, Walter served as the Chair of the Board of Trustees of the Albuquerque Academy, an independent day school, and is Chair-Elect of the Albuquerque Community Foundation and chairs the Community Foundation's Impact Investment Committee which is making a difference in Albuquerque through locally focused investments in businesses and non-profits, trading some financial returns for social impact returns in the community.

Walter has served as President of Modrall Sperling and Chair of the Executive Committee since January, 2013.