About Baumgartner Law, LLC

My name is Birk Baumgartner, and I am the principal at Baumgartner Law, LLC. I graduated Cum Laude from Southern Methodist University Dedman School of Law, and have been a litigator ever since.

I am the fourth attorney in my family, but unlike my family members, I declined a job at a big law firm. Instead, I decided to dedicate my practice to a limited number of cases, with focused and individualized care and the freedom to take only those cases that I believe are just.

I believe that access to great legal counsel should not be limited to those that can provide large up-front retainers. I will always listen to anyone’s legal questions and provide the best advice possible; and I will work to find a financial arrangement that works for you.

Sean Simeson is an Associate Attorney at Baumgartner Law. Previously, he worked in plaintiff personal injury and workers’ compensation firms where he represented individuals against large insurance companies in state and federal courts.

In addition to his personal injury experience, Sean represents people accused of criminal charges. He focuses on providing thorough and exhaustive representation to all clients from the intake through jury verdict.

In law school, Sean was the President of the Student Animal Legal Defense Fund; he was an assistant attorney for Southeast Louisiana Legal Services, and he received awards for the highest grades in Criminal Law and American Indian Law.

Sean already has a proven track record of success. He has a personable approach with clients and prides himself on hard work to obtain the best results for his clients.

Dr. Greife passed the CA and CO bar exams in 2010 and since beginning the practice of law has earned two masters degrees and a PhD.  Dr. Greife is primarily a criminal defense and civil rights attorney.  Over his career Dr. Greife has secured numerous not guilty verdicts and sentences that are incredibly lenient for his clients.  Additionally, he has convinced judges to give sentences that are below a mandatory minimum sentence – a feat very few criminal defense lawyers are able to accomplish.  Dr. Greife is consistently retained as an expert witness for issues regarding sentencing, law enforcement culture and practices, the use of science in the law and the drafting of model legislation for environmental justice and social justice advocates.

On top of practicing law Dr. Greife has, or currently teaches, courses on criminology, law & society, corrections & punishment, environmental justice/crime, white collar and corporate crime and social control at Colorado State University.  Furthermore, Dr. Greife is an active researcher that continues to publish articles in peer reviewed journals in order to promote the use of empirical data in legal decision making and the drafting of legislation.  Below is a list of Dr. Greife’s publications.

Greife, Matthew J and Michael O. Maume (2019). “Do Companies Pay the Price for En- vironmental Crimes? Consequences of Criminal Penalties on Corporate Offend-ers.” https://link.springer.com/article/10.1007/s10611-019-09863-4.

Greife, Matthew J.; Paul B. Stretesky; Tara O’Conner-Shelly and Mark R. Pogrebin (2017). “Corporate Environmental Crime and Environmental Justice.” Criminal Justice Policy Review. 28(4): 327-346.

Goodrum, Sarah, Mark Pogrebin, Matthew Greife (2015). “Representing the Underdog: The Righteous Development of Death Penalty Defense Attorneys.” Criminal Law Bulletin. 51(2): 329-357. Reprinted in: Copes, Heath and Mark Pogrebin (2017). Voices from Criminal Justice: Insider Perspectives, Outsider Experiences. 2nd Ed.


Our Mission

We are active members of the Colorado Bar Association, the Colorado Trial Lawyers Association, and the Colorado Criminal Defense Bar, among numerous other professional associations. Our experience encompasses a broad range of legal areas, including: criminal defense; personal injury; police brutality and excessive force; employment law; fraud; contract disputes; and social security disability. If you need an expert in an area of law that we don’t handle, we will help you find the right attorney.

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