Ronnie was born and raised in New York. He has always had a passion for the Colorado Rocky Mountains. Throughout high school, college, and law school he made many trips out west to spend time on the ski slopes. During that time he also discovered a love for business and the law. He attended Cornell University for their excellent business program, and received his Bachelor's of Science in Business Management and Marketing in 1999. While attending Benjamin N. Cardozo School of Law he was able to spend a summer at the Central European University where he concentrated his studies on alternative dispute resolution techniques including arbitration, mediation, and negotiation. He received his Juris Doctorate with a concentration in alternative dispute resolution and intellectual property in 2003. With a law degree in hand, Ronnie moved to Colorado to be nearer to the mountains he loves. He was admitted to the Colorado Bar in 2003. Since then, Ronnie has focused his legal career to assist clients in the areas of intellectual property (i.e., copyrights, trademarks, and patents), business, real estate, personal injury and probate law. When Ronnie is not working, he is happily enjoying all the wonderful outdoor activities that Colorado has to offer: skiing, mountain biking, tennis, white water rafting, and four-wheeling.

TNS Associates is a firm that was built on the unwavering commitment to obtain superior results for those we have the privilege of representing and at a reasonable cost. You will also find people who genuinely care about you. We are committed to acting on your behalf, representing your interests with passion.

Nelson Boyle serves as Senior Counsel at Singleton Schreiber's Denver, Colorado office, where his practice spans civil rights, personal injury, insurance recovery and bad faith, class actions, mass torts, sexual assault and human trafficking, wrongful death, trucking accidents, and motions, writs, and appeals. A Colorado native, Mr. Boyle brings nearly 20 years of litigation experience fighting for plaintiffs in Colorado's state and federal trial and appellate courts. Mr. Boyle is widely recognized for his appellate acumen, having handled matters as both merits and amicus curiae counsel that have resulted in published opinions addressing insurance bad faith, the Colorado Governmental Immunity and Premises Liability Acts, pleading standards, and other significant legal issues. His appellate work has spanned an exceptionally broad range of matters, including personal injury, civil rights, premises liability, child sexual abuse, medical and legal malpractice, class actions, and criminal appeals. Mr. Boyle has also served as a trusted resource for trial counsel, assisting with civil discovery, motions practice, jury trial preparation, and the preservation of appellate issues, including drafting targeted trial briefs and advocating for fair and accurate jury instructions. Mr. Boyle earned his Juris Doctor from the University of Denver Sturm College of Law, a Master of Arts in American History from New Mexico State University, and a Bachelor of Arts from Temple University. He is admitted to practice before the Colorado Supreme Court, the Colorado Court of Appeals, Colorado trial courts, the United States District Court for the District of Colorado, the United States Tenth and Eighth Circuit Courts of Appeals, the United States Court of Federal Claims, and the United States Supreme Court. Mr. Boyle's commitment to the legal community extends well beyond the courtroom. The Colorado Trial Lawyers Association (CTLA) honored him with its 2012 New Trial Lawyer of the Year award and its 2016 Outstanding Service to CTLA award, recognizing his dedication to consumer and plaintiff advocacy and his leadership within the organization. He currently serves as a Trustee for the Colorado Legal Aid Foundation, as Chair Emeritus of CTLA's Amicus Curiae Committee, and as a volunteer member on the Amicus Curiae Committees of CTLA, the American Association for Justice (AAJ), and the Colorado Bar Association (CBA). He has previously served as a Commissioner and Chair of Colorado's Second Judicial District Judicial Performance Commission, on the CTLA Board, as an AAJ Governor, and on AAJ's New Trial Lawyers Board. He has also been recognized by Best Lawyers in America, Colorado Super Lawyers, Avvo, and Marquis Who's Who. Outside the office, Mr. Boyle keeps active by skiing, hiking, traveling, and camping with his family. He and his wife have backpacked in the Grand Canyon, including a single-day rim-to-rim traverse, ascended Yosemite's Half Dome, and have set their sights on completing the Colorado, Arizona, Northern Colorado, and Santa Fe to Taos trails in segments over the coming years.

Kevin Hannon is a partner in Singleton Schreiber and a member of our environmental litigation, mass tort, and personal injury and wrongful death practice groups. Mr. Hannon has extensive experience in successfully litigating environmental cases in multiple state and federal courts. Two of Mr. Hannon’s environmental trials, Orjias v. Louisiana-Pacific and Escamilla v. Asarco, achieved the largest jury awards in environmental cases in Colorado at the time of verdict. The Escamilla case resulted in a $28 million verdict and the cleanup of a neighborhood of 570 homes. His work in NWIS v. Public Service resulted in the application for closure of a leaking underground natural gas storage facility. In Wilks v. Phelps Dodge, Mr. Hannon acted as lead counsel on behalf of a community with contaminated groundwater and achieved a settlement that included a medical monitoring program, replacement drinking water wells, and monetary compensation for his clients. In many of Mr. Hannon’s environmental cases, he has negotiated not only a monetary payment for his clients, but also remediation of the contamination. Mr. Hannon is currently serving as the Chair of the Class Action Committee for Depo-Provera Injection Litigation. He has served and now serves as lead counsel in several environmental class actions in several states including Arizona and Missouri. Mr. Hannon has successfully completed cases involving air, groundwater, soil and noise pollution and continues to represent businesses and individuals for personal injury and property damage from solvents, heavy metals, lead waste, lead paint, radiation, pesticides, petroleum products, and other substances. Mr. Hannon has given dozens of seminar presentations for professional attorneys’ associations during the past three decades. His recent seminars for the American Association for Justice included “Rapid Response Seminar: Recent Train Derailments: Environmental and Toxic Torts, Damages,” March 2023; “Avoiding Federal Court By Avoiding Snap Removal,” July 2022; and “Update on Medical Monitoring Case Law,” July 2021. Prior to joining Singleton Schreiber, Mr. Hannon established The Hannon Law Firm in 1988. Before beginning his law career, Mr. Hannon worked for the U.S. Environmental Protection Agency (EPA) in the air quality and toxic substances programs. Mr. Hannon graduated from Georgetown University Law Center. He earned a master’s degree cum laude in environmental management from Duke University. During law school, Mr. Hannon served as science advisor for Trial Lawyers for Public Justice (TLPJ), a national public interest law firm. Mr. Hannon is a member of the Association of Trial Lawyers of America, Colorado Trial Lawyers Association (CTLA), American Association of Justice, and bar and trial associations for the District of Columbia, Missouri, New Hampshire, Wisconsin, and Wyoming. He chaired the American Association of Justice’s Environmental and Toxics Committee from 2022-2023. In 2024, Mr. Hannon was elected as one of six Governing Board Members with Public Justice. Mr. Hannon’s work has been recognized with numerous professional awards, including the “Trial Lawyer of the Year” award from the Trial Lawyers for Public Justice Foundation in Washington, D.C., and CTLA’s “Case of the Year” and “Outstanding Young Trial Lawyer” awards. Mr. Hannon is admitted to practice in the state courts of Colorado, the District of Columbia, Missouri, New Hampshire, Wyoming and Wisconsin; the U.S. District Court for the districts of Arizona, Colorado, and the Eastern and Western districts of Missouri; the First, Third, Eighth, and Tenth Circuit Court of Appeals; the U.S. Court of Federal Claims; and the U.S. Supreme Court. Since moving to Denver, Mr. Hannon has served on the Management Committee for the NCAA Men’s Final Four Basketball Tournament. He worked for the Colorado Baseball Partnership and on the Management Committee for the Colorado Baseball Commission in the efforts to build a new baseball-only stadium and to locate a Major League Baseball franchise in Colorado.

Jessica Meeder is Senior Counsel at Singleton Schreiber and part of the firm’s Environmental Litigation group, where she focuses on complex litigation strategy, briefing, and advocacy.

Attorney Mark P. Martens has been practicing law since 1986. His areas of practice include: Car Accidents, Truck Accidents, Drunk Driving Accidents, Motorcycle Accidents, Uninsured Motorists, Slip & Fall, Personal Injury, Wrongful Death, Dog Bites, Sexual Abuse. Have you been injured in a car, truck or drunk driving accident? Choose the attorneys at Martens & Associates to handle your legal case in Denver, CO. When you choose us, we'll provide you with the best legal services that we can. We fight for our client's rights when they have been injured. You deserve to work with a skilled and experienced legal team for your needs. Whether you have been injured in a car wreck at someone's fault, severely bitten by a dog or you lost a loved one due to wrongful death, we are here to help you.

Dan has been practicing law since 1986. He began his career with the District Attorney’s Office followed by a term with the Enforcement Division of the Securities and Exchange Commission. Later, he became in-house counsel for an OTC securities registered Broker / Dealer. Prior to the formation of Levin Jacobson Japha, P.C. he counseled clients in private practice for many years. Dan has extensive experience in and focuses his practice on counseling businesses and handling partnership disputes; corporate law; private placement financing; regulatory compliance; business succession matters; mergers, acquisitions; employment issues; corporate and regulatory compliance; health care provider law; wills, estate and probate administration matters; divorce, custody family law and domestic partnership issues; personal injury accidents; and administrative law matters. He holds a B.A. from the University of Colorado and a J.D. from the University of Denver College of Law. Dan is a member of the Trust and Estate, Family Law, and Business Law sections of the Denver, Colorado, and American Bar Associations, has been admitted to the U.S. District Court, U.S. Court of Appeals, and the United States Supreme Court. He has written numerous articles on business law matters and has served on the boards of several non-profit organizations, and represents a wide range of companies, commercial enterprises, medical providers, business owners and individual clients. Accomplishments over his 30-year career include obtaining a multi-million dollar jury verdict against a major telecommunications company; obtaining a million-dollar business saving verdict on behalf of a family-owned metal fabricating company; achieving a six-figure settlement in a restaurant personal injury case involving dangerously hot coffee spilling on a customer; negotiating numerous multi-million dollar private placement financings, mergers and acquisitions; negotiating and litigating numerous company partnership disputes and settlements, and negotiating purchase, product and supply contracts on behalf of many prodigious businesses.

Katherine Jane Jenkins is a long-established business, founded in 2001, serving the Denver, CO region and its surrounding areas. With close to two decades of experience in the industry, Katherine Jane Jenkins has earned a reputation for providing top-notch services. The company's dedication to customer satisfaction is demonstrated by its enduring presence in the regional market.

Over his more than three decades of practice, David Japha has earned a reputation for resolving difficult and complex matters, sometimes being the second or third lawyer to take on a case. David has tried many criminal and civil cases to conclusion and argued numerous appeals, post-conviction cases and cases involving mental health issues. He also currently represents clients in federal and state administrative matters, including ongoing matters before the Consumer Products Safety Commission. David got his start in litigation before leaving the University of Denver College of Law, where he tried his first DUI case in state court through a program called the student law office. He also negotiated settlements and argued his first administrative appeal before the Social Security Administration in the winter of 1984, before his law school graduation in May of that year. Soon after starting out, David shared office space with his current partners, Don Jacobson and Daniel Levin at Ptarmigan Place. There he learned law office management hanging out his shingle and doing evictions, collections and court-appointed federal criminal cases. And, it was there, in federal court, that David truly cut his teeth in criminal defense litigation, culminating in his appointment to the Criminal Justice Act committee (which oversaw the appointment of conflict counsel in federal court) by then-Chief Judge Richard Matsch. Over 30 years of practice has given David the opportunity to be involved in some amazing cases, including taking depositions in Katmandu, Nepal in a complex criminal case in 1991; representing a witness in the trial of Timothy McVeigh (where David was also a credentialed reporter for the Intermountain Jewish News); handling criminal matters in Nebraska, Kansas and California and appearing in Washington State. David has been an expert witness for the Colorado Supreme Court Office of Regulation Counsel in the area of attorney fees for court appointed counsel.