Our Team
James N. Tallberg is Managing Partner of the firm. He is a graduate of the University of Connecticut School of Law, with honors, and Southern Connecticut State University. He was admitted to the Connecticut Bar in 1996, and is also admitted to the United States District Court for the District of Connecticut, the Southern and Eastern 
Districts of New York, the Second and Ninth Circuit Courts of Appeal, and the United States Supreme Court. Mr. Tallberg has been board certified as a Civil Trial Advocate by the National Board of Trial Advocacy since 2010. He has also been awarded the “Super Lawyers” designation since 2019.
Mr. Tallberg's practice includes the defense of public entities and officials, including law enforcement, educators, professional liability defense, employment practices liability, and business litigation. He has tried more than thirty cases to verdict or court judgment including claims of wrongful death, civil rights claims under 42 U.S.C. § 1983 for unreasonable force, police shootings, TASER deployments, false arrest, unlawful search and seizure, First Amendment retaliation, assault, negligence, breach of contract, and CUTPA.
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Mr. Tallberg is a former Chairman of the Rocky Hill Charter Revision Commission and has been a member of the Executive Committee of the Connecticut Bar Association's Federal Practice Section since 2010. In 2015, he was appointed by the Judges of the United States District Court for the District of Connecticut to serve on the Local Civil Rules Advisory Committee. Mr. Tallberg is a past recipient of the Connecticut Law Tribune "New Leaders of the Law" Award. From 2004 until 2016, he served as an appointee of the Governor on the Connecticut Police Officer Standards and Training Council ("POST"). In January 2020, Mr. Tallberg was appointed as Town Attorney for the Town of Enfield, serving until December 2023. In November 2021, he was appointed Corporation Counsel for the Town of East Hartford.
Mr. Tallberg is a member of the Federal Bar Council, Connecticut Bar Association, Hartford County Bar Association, Defense Research Institute, Connecticut Defense Lawyers Association, and he serves as an elected member of the Board of Directors of the Connecticut Association of Municipal Attorney. jtallberg@kt-lawfirm.com
Dennis M. Durao is a Partner and graduate of Wheaton College. He received his J.D., magna cum laude, from Quinnipiac University School of Law, where he earned numerous academic awards and served as the Articles Editor for the Health Law Journal. His article, An Endangered Species: Professional Sports Team Physicians, was published in that journal. He was admitted to the Connecticut Bar in 2012, and is also admitted to practice in the United States District Court for the District of Connecticut and Eastern District of New York, as well as the Second Circuit Court of Appeals.
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An accomplished counselor and litigator, Dennis helps public- and private-sector clients anticipate and respond to the increasingly complex body of state and federal laws governing the employer-employee relationship. In addition to providing progressive, dynamic and pragmatic counsel to employers, Dennis has vast experience in litigating employee claims, both in state and federal courts, as well as before administrative agencies. Beyond his employment practice, Dennis also represents police officers in civil rights matters and defends elected and appointed public officials against a broad spectrum of civil claims, from pre-suit negotiations through trial, including a declaratory judgment action, civil rights claims under 42 U.S.C. § 1983 for unreasonable force, false arrest and malicious prosecution, and state law claims for assault, battery and negligence. Dennis’ diverse litigation experience also includes successfully briefing and arguing various appeals in state and federal court.
Dennis is a member the Connecticut Association of Municipal Attorneys and serves as the General Counsel/Risk Manager for West Hartford Girls Soccer League, Inc. He is a member of The Oliver Ellsworth American Inn of Court, and has been named one of the 2018 Connecticut Law Tribune’s New Leaders in the Law; a Connecticut Super Lawyer Rising Star® (Employment Litigation: Defense (2020-2022, 2025)); and in The Best Lawyers: Ones to Watch® (Litigation - Labor and Employment, Municipal Law, and Personal Injury Litigation - Defendants) (2022-2026). ddurao@kt-lawfirm.com
Andrew J. Glass is a Partner and graduate of Elon University. He received his J.D. from the University of Connecticut School of Law. While in law school, he interned for the Commission on Human Rights and Opportunities and worked as a law clerk for Karsten and Tallberg, LLC. In addition, Mr. Glass was Symposium Editor for the Connecticut Journal of International Law and worked with the Law School Mediation Clinic.
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Mr. Glass was admitted to the Connecticut Bar in 2015, and is also admitted to the United States District Court for the District of Connecticut, the Second Circuit Court of Appeals, and the United States Court of Appeals for the Federal Circuit. His practice focuses on the defense of public entities and insurers, including law enforcement liability, civil rights litigation, employment practices liability, and general, premises and automobile liability, including uninsured and underinsured motorist claims.
Mr. Glass has successfully briefed and argued cases before the Second Circuit Court of Appeals and Connecticut Appellate Court. He previously served as a member of the Connecticut Bar Association Young Lawyers Executive Committee and currently sits on the Connecticut Bar Association House of Delegates representing District 17.
aglass@kt-lawfirm.com
Kimberly A. Bosse is a Senior Associate at Karsten & Tallberg, LLC. Her practice focuses on employment and civil rights defense litigation, representing municipalities, public officials, and private entities in all stages of litigation – from administrative agency proceedings through trial and appeal. Ms. Bosse also advises small businesses and non-profit organizations on the full range of workplace and personnel issues that arise in daily operations, helping employers respond lawfully and strategically to employee concerns, discipline and discharge decisions, accommodation requests, wage and hour compliance, and other sensitive HR matters.
Before joining the firm, Ms. Bosse served as a law clerk at the Connecticut Appellate Court for the Honorable Thomas A. Bishop, the Honorable Lubbie Harper, Jr., and the Honorable Stuart D. Bear. Ms. Bosse brings her passion for appellate advocacy to her work at KT Law, where she prepares and argues appellate motions and briefs contemplating a wide range of legal issues before both the Connecticut Appellate Court and the Second Circuit Court of Appeals.
Ms. Bosse received her B.A., magna cum laude, from Hofstra University, and her J.D., with honors, from the University of Connecticut School of Law. While in law school, she served as a Note and Comment Editor for the Connecticut Law Review and was a member of the Moot Court Board. She is the recipient of the ABA Section of Urban, State, and Local Government Award and four CALI Excellence Awards for academic performance. Admitted to the Connecticut Bar in 2019, Ms. Bosse is also admitted to practice before the United States District Court for the District of Connecticut and the United States Court of Appeals for the Second Circuit. She is a member of the Connecticut Bar Association’s Young Lawyers Section and Planning & Zoning Section, and a former member of the Oliver Ellsworth American Inn of Court.
In addition to her practice, Ms. Bosse oversees KT Law's Summer Associate program and serves as a Trustee of the New Britain Public Library, where she sits on the Executive Board. kbosse@kt-lawfirm.com
Keith T. Trumbo is an associate and graduate of the University of Connecticut. He received his J.D. from the University of Connecticut School of Law, where he was a member of the Connecticut Law Review and received CALI Excellence Awards for having received the highest grades in Legal Research and Writing and Advanced Legal Writing.
Prior to joining Karsten & Tallberg, Mr. Trumbo worked at a private firm in Hamden, beginning as a full time paralegal while obtaining his J.D. before becoming an associate with the firm.
His practice focused on family, civil and criminal matters.
Mr. Trumbo was admitted to the Connecticut Bar in 2022. Keith T. Trumbo
Abraham “Avi” J. Schwimmer is an associate attorney at Karsten & Tallberg, LLC and previously worked with the firm as a law clerk during his time in law school. Mr. Schwimmer received his B.A., cum laude, in Political Science and Economics from the University of Connecticut in 2016, and went on to earn his J.D. from the University of Connecticut School of Law in 2025, along with a Certificate in Insurance Law and Regulation.
While in law school, Mr. Schwimmer served as an editor and active member of the Connecticut Insurance Law Journal. During this time, Schwimmer also worked at the Connecticut State Capitol, assisting the Judiciary Committee and Claims Commissioner’s Offices in the review and analysis of claims brought against the state, conducted legal research, and drafted memoranda addressing issues of sovereign immunity, state liability, and statutory interpretation.
Later, as a law clerk with Karsten & Tallberg, Schwimmer supported the firm’s representation of public officials and law enforcement officers in a range of civil litigation matters. His work included legal research, drafting motions, and assisting with discovery in cases involving civil rights claims under 42 U.S.C. § 1983.
In 2025, Mr. Schwimmer was admitted to the Connecticut Bar.
Abraham “Avi” J. Schwimmer
Scott M. Karsten (1951 – 2021) was a graduate of Wesleyan University and the University of Connecticut School of Law, where he was third in his class and graduated with honors. He was admitted to the Connecticut Bar in 1982, the Pennsylvania Bar in 2002, and was also admitted to practice in the United States District Courts for the Districts of Connecticut, Vermont and New York (Eastern and Southern), the Second Circuit Court of Appeals, and the United States Supreme Court.
Mr. Karsten was a member of the American Board of Trial Advocates and an emeritus of the Oliver Ellsworth Inn of 
Court. Prior to practicing law, he was a police officer and president of the police union in West Hartford, Connecticut.
Mr. Karsten's practice focused upon jury trials of complex civil actions in both state and federal courts; he tried over seventy cases to verdict or court judgment. He also engaged in extensive appellate work at both the state and federal levels. In addition to handling a variety of other tort defense cases, Mr. Karsten concentrated on the defense of civil rights actions against state and municipal government employees and officials, education agencies and employees, public and private sector employment matters, and professional liability claims, including legal and architectural malpractice. Mr. Karsten also frequently engaged as a speaker at continuing legal education seminars for the various bar associations of which he was a member, and other groups. From 2009 until his retirement, Mr. Karsten had been selected by his peers as a New England and Connecticut "Super Lawyer," as published in Connecticut Magazine's "Super Lawyers" Section.
Ana Oliveira is the Firm’s Administrator and Senior Paralegal. She is a graduate of Catholic University of Portugal in Porto, where she obtained her Juris Doctorate degree in 2001. She is responsible for the Firm’s day-to-day administrative operations, including management of the Firm’s information systems, accounting functions, and records management.
She also provides legal support, including preparation and review of state, federal, and administrative e-filings, discovery, and trial materials, on all of the Firm’s litigation matters.
aoliveira@kt-lawfirm.com
Amanda N. Mattei is a paralegal and graduate of Purdue University Global, where she completed a A.S. in Legal Support and Services, magna cum laude. During her time there, she worked as a paralegal for a Foreclosure and Bankruptcy firm where she learned the foundations of day to day responsibilities and operations.
Following her graduation, she immediately returned to school and received her B.A. in Legal Support and Services, magna cum laude, through Purdue University Global while working as a full-time paralegal. While working on her B.A., Ms. Mattei earned Academic Achievement Awards for Interpersonal Communications, Professionalism in the Global Workplace, and Applied Legal Ethics. amattei@kt-lawfirm.com