John Combs represents employers in matters relating to their international workforce, assisting with development of coordinated processes for transition of temporary nonimmigrant workers to lawful permanent resident "green card" holders. His practice focuses primarily on the initial permanent labor certification process overseen by the U.S. Department of Labor. He also advises on portability issues when foreign employees change positions and successor-in-interest issues when employers undergo corporate changes.

Prior to joining Constangy, John acquired more than 25 years of business immigration experience at immigration boutique, regional and national law firms. He has directed business immigration programs for a number of multinational companies, particularly in the information technology sector, assisting those employers with development of streamlined processes for preparation of nonimmigrant visa petitions, coordination with the lengthy permanent residency application process, and implementation of employment verification compliance programs.

Honors & Recognitions

  • Best Lawyers in America® (2010-2024)
  • Best Lawyers in America® "Lawyer of the Year" for Immigration, Denver (2016, 2018)

Professional & Civic Associations

  • American Immigration Lawyers Association
  • Colorado Bar Association

About Me

Outside of the office, John can often be found enjoying the mountains of Colorado, snowboarding, skiing, biking and hiking with his family.


Practice Emphasis

  • Lawful permanent residency processes that employers undertake to sponsor their foreign workers for “green cards."
  • These include:
  • - Permanent labor certifications
  • - Immigrant visa petitions
  • - Adjustment of status applications
  • - Portability requests when employment changes
  • - Immigrant visa applications at foreign posts


University of Denver

  • LL.M., Taxation, 1989

University of Idaho

  • J.D., 1983

Michigan State University

  • B.S., 1978

Bar & Court Admissions

  • Colorado, 1984
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