J. William "Bill" Callison

Nick Fogel is the practice group leader of Burg Simpson’s workers’ compensation department, which has achieved Tier 1 status by US News and World Report (the highest-ranking available). His practice is devoted to those who have been injured while working on the job and in the line of duty. In this capacity, Nick has extensive courtroom experience handling a wide variety of matters. Nick’s practice focuses on the representation of law enforcement, firefighters, and first resp...

John H. Tatlock is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. John H., who practices law in Denver, Colorado, has been recognized since 2015. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which John H. is held by other top lawyers in the same geographic and legal practice area.

Jim has been a lawyer for 39 years representing over 1,900 family law clients. His years of experience in litigating and negotiating family law cases has honed his ability to achieve success in mediation. Jim was a Municipal Court Judge for 22 years. His experience as a judge has provided him with the demeanor and temperament to arbitrate family law cases. Jim has mediated and arbitrated a myriad of issues including decision-making and parenting time, child support, complex property division,...

Ryan Lessmann is the office managing principal of the Denver, Colorado, and Salt Lake City, Utah offices and is a client solutions leader of Jackson Lewis P.C. He practices primarily in the area of employment litigation, including representing employers against claims alleging discrimination, retaliation, and wrongful termination, matters involving trade secret protection, restrictive covenants and unfair competition, and various contract issues. Ryan also counsels and defends employers in wa...

Amanda Pfeil Hood focuses her practice on personal injury, wrongful death, and medical malpractice. Amanda primarily works with clients who have suffered traumatic brain or orthopedic injuries. She also has significant experience in sports injury cases arising from an athlete’s premature return to play following a concussion. Immediately upon graduating law school, Amanda served as a judicial clerk with a Colorado Court of Appeals, an experience that helped her develop a strong analytic...

Michael R. Greco is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Litigation - Labor and Employment. Michael R., who practices law in Denver, Colorado, has been recognized since 2019. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Michael R. is held by other top lawyers in the same geographic and legal practice area.

Jim Rigberg is a seasoned business lawyer who provides end-to-end client representation in a variety of contexts. With particular expertise in the real estate and healthcare industries, Jim puts his years of courtroom experience to work advising clients on front-end strategies to secure optimal leverage and avoid exposure to costly litigation down the road. Jim also focuses his practice on Intellectual Property, where he helps clients protect their investments in their brands and creative out...

Ron is head of the environmental practice group and has over 30 years of experience in environmental matters including prior work as a physical scientist for the Denver Regional Office of the U.S. Environmental Protection Agency. He represents all types of clients, including various municipalities and other public sector clients, in environmental matters related to Environmental Compliance Audits, Voluntary Cleanups, Underground Storage Tanks, Asbestos, Water Quality, Air Quality, Hazardous W...

Katherine Ellis is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law and Juvenile Practice. Katherine, 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 Katherine is held by other top lawyers in the same geographic and legal practice area.

Stephen Wahlberg is one of the founding partners at Denver Trial Lawyers. He brings years of experience and knowledge in personal injury law to each case he takes on. His commitment to clients and attention to details have led to numerous million-dollar victories including a $2.5 million jury verdict in a car wreck case. Attorney Wahlberg currently serves as the co-chair of the Colorado Trial Lawyers Association Auto Litigation Committee as well as the Board of Directors for CTLA. He was list...