Janine A. Guillen
About Janine A. Guillen
Janine A. Guillen is a lawyer based in Lone Tree, CO and has been recognized in The Best Lawyers in America® since 2026. Janine A. Guillen is recognized in the following practice area:
- Lone Tree, Colorado
- Tax Law
Current Firm: Guillen Degeorge LLP
Education: University of Denver, J.D.
Location: Lone Tree, CO
Nearby Lawyers
Hannah Jannicelli Westmont is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Hannah Jannicelli, who practices law in Lakewood, Colorado, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Hannah Jannicelli is held by other top lawyers in the same geographic and legal practice area.
Bill Groh is a trial-focused commercial litigator with LMB Partners in Denver, Colorado, representing clients in high-stakes disputes where precision, strategy, and decisive action matter. He handles complex cases involving contracts, business torts, intellectual property, fraud, and partnership conflicts, and is known for approaching litigation with a rigorous command of the facts and an unyielding commitment to advancing his clients’ positions. Bill’s practice centers on identif...
Mary Sue Greenleaf is a top attorney recognized by Best Lawyers in the practice area(s) of Construction Law and Litigation - Construction. Mary Sue, who practices law in Denver, Colorado, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Mary Sue is held by other top lawyers in the same geographic and legal practice area.
Robert Craig Ewing is a top attorney recognized by Best Lawyers in the practice area(s) of Insurance Law, Personal Injury Litigation - Defendants and Personal Injury Litigation - Plaintiffs. Robert Craig, who practices law in Littleton, Colorado, has been recognized since 2009. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Robert Craig is held by other top lawyers in the same geographic and legal practice area.
Mari Perczak is the co-practice group leader of the Construction Defects department at Burg Simpson. She and her department have achieved Tier 1 status by US News and World Report, which is the highest-ranking available. Ms. Perczak has more than thirty years of experience as a Colorado trial lawyer and has successfully handled many large construction defect cases for Colorado homeowners and homeowner associations. In 2020, Ms. Perczak was lead trial counsel in a lengthy arbitration where she...
Terry Freeman is a Shareholder and a member of the Firm’s Commercial Finance practice group and practices in Denver and Dallas. Mr. Freeman represents banks and other financial services clients in connection with commercial and corporate lending transactions and related activities. Mr. Freeman has over 40 years of experience in structuring, documenting, servicing, and workout of commercial and corporate finance transactions. During his almost 30 years of providing legal counsel to finan...
Doug has been an Assistant United States Attorney and Assistant District Attorney. Now that he is in private practice, Doug is one of Colorado’s most experienced and acclaimed criminal defense lawyers. AV rated by Martindale-Hubbell, with a perfect 10.0 / “Superb” rating by AVVO, Doug has been chosen as a “Rising Star” for several years—a distinction limited to 2.5% of Colorado’s practicing attorneys under the age of 40. In 2018 to 2020, he was recogn...
Steve Suneson is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law and Tax Law. Steve, who practices law in Denver, Colorado, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Steve is held by other top lawyers in the same geographic and legal practice area.
Bryan focuses his practice on advising privately-held business and their owners with respect to mergers and acquisitions, entity formation and operation, sales, purchases and leasing of real estate, commercial real estate, private placements of securities, and wills, trusts and business succession planning. Bryan is a past member of the Board of Governors of the Colorado Bar Association.
Explore and Learn
2026 Best Lawyers Awards: Recognizing Legal Talent Across the United States
by Jamilla Tabbara
The 2026 editions highlight the top 5% of U.S. attorneys, showcase emerging practice areas and reveal trends shaping the nation’s legal profession.
Gun Rights for Convicted Felons? The DOJ Says It's Time.
by Bryan Driscoll
It's more than an administrative reopening of a long-dormant issue; it's a test of how the law reconciles the right to bear arms with protecting the public.
2026 Best Lawyers Awards in Canada: Marking 20 Years of Excellence
by Jamilla Tabbara
Honoring Canada’s most respected lawyers and spotlighting the next generation shaping the future of law.
How to Sue for Defamation: Costs, Process and What to Expect
by Bryan Driscoll
Learn the legal standards, costs and steps involved when you sue for defamation, including the difference between libel and slander.
Best Lawyers 2026: Discover the Honorees in Brazil, Mexico, Portugal, South Africa and Spain
by Jamilla Tabbara
A growing international network of recognized legal professionals.
Build Your Legal Practice with Effective Online Networking
by Jamilla Tabbara
How thoughtful online networking supports sustained legal practice growth.
Blogging for Law Firms: Turning Content into Client Connections
by Jamilla Tabbara
How law firms use blogs to earn trust and win clients.
Reddit’s Lawsuit Could Change How Much AI Knows About You
by Justin Smulison
Big AI is battling for its future—your data’s at stake.
How to Choose a Good Lawyer: Tips, Traits and Questions to Ask
by Laurie Villanueva
A Practical Guide for Your First-Time Hiring a Lawyer