Christine C. Mastin

Partner / (303) 217-4876

NOTE: As of July 1, 2022, Ms. Mastin is on sabbatical. She is not practicing law and is not taking new clients.

Ms. Mastin practices international law and provides specialized assistance in select immigration matters.  Representative casework includes assisting US companies with foreign counsel relationships and oversight (specializing in Latin America), entity formation in East Africa, and international transactions.  Ms. Mastin is a native speaker of Spanish.

Professional Experience

  • Mastin Bergstrom LLC (formerly Mastin Law Firm, PC), Managing Partner 2003 – Present
  • Rothgerber Johnson & Lyons LLP, 1999 – 2003
  • Justice Information Center, Inc.  Denver, CO – Public Interest Attorney (Immigration), 1998 – 1999


  • 2009, 2010, 2011 and 2012 SuperLawyers, named ‘Rising Star’ in Immigration Law
  • 2010 Denver Business Journal “Forty under 40” winner
  • 2005 recipient of the Community Impact Award, SafeHouse Denver, Inc.
  • 2001 recipient of the Ira C. Rothgerber Community Betterment Award
  • 2000 recipient of the SafeHouse Denver, Inc. Bilingual Volunteer of the Year Award

Community Leadership

  • ProBono Counsel and Kugaba Sponsor, Hope Haven Rwanda, 2017 – Present
  • Member, Board of Directors, International Development, His Little Feet International Children’s Choir, 2018 – Present
  • Trustee, Member of Board of Trustees, Colorado Christian University, 2013 – 2018
  • Volunteer Mentor Attorney, AILA MAP Program (providing assistance to U.S. military families stationed abroad)
  • Vice-President, 2008 Class, Leadership Program of the Rockies
  • Adjunct Lecturer of Immigration Law, University of Denver College of Law, 2006

Professional Memberships and Affiliations

  • Member, American Immigration Lawyers Association
  • Member, Colorado Bar Association, International Law Division
  • Member, Denver and Colorado Bar Associations
  • Admitted to practice before all Colorado courts, the U.S. District Court for the District of Colorado, and the U.S. Court of Appeals for the Tenth Circuit