About Our Team

When life knocks you down and you need a lawyer’s help, you shouldn’t have to worry about whether you’ve chosen the right attorney to represent you.

Dillon Grube, LLC’s mission is to be the ideal provider of legal services for modern-day clients.  We are a group of uniquely experienced, results-driven, and no-nonsense legal professionals who know we cannot achieve ideal client outcomes unless we also do it as efficiently as possible.

Although technology has transformed much of our lives over the past 20 years, lawyers sometimes struggle to keep up.  At Dillon Grube, LLC, we use the power of modern technology to run our practice as efficiently as our clients run theirs, so that we can deliver our services with minimum overhead and maximum impact. With Dillon Grube, LLC, you always know exactly what you are paying for.

Duffy Dillon has developed a one-of-a-kind practice for lawyers working in Rock County.  Few local attorneys can match Duffy Dillon’s experience when it comes to personal injury litigation after defending insurance companies for over 18 years. When Duffy’s personal injury experience is combined with his accounting background and experience serving as civil litigation counsel and general counsel for local businesses, no other lawyer working in Rock County has the unique mix of experience Duffy brings to the table. 

Joshua Grube has been criminal lawyer for the past 21 years. For the first half of his career, Joshua was a criminal prosecutor for the State of Wisconsin and appointed the Deputy District Attorney for the County of Walworth. 

For the past decade, Joshua has been defending people charged with all levels of alleged violations.  He has seen these cases from both sides of the courtroom and will use this unique perspective to protect your rights and negotiate unique and personalized resolution options.  Joshua has spent his career developing relationships with prosecutors, judges, police officers, probation agents and social workers.  Whether you are facing a traffic ticket or life changing criminal charges, you want a smart, dedicated, and experienced criminal lawyer like Joshua working for you. 

Jonathan W. Groessl has been representing local businesses for over 30 years in the areas of corporate, real estate, construction and business law.  Before locating in Janesville, Jon worked in the Business Combinations areas for an international accounting firm, in the mergers and acquisitions area of a private equity firm, and as the Assistant General Counsel for a major heavy equipment and truck trailer manufacturing concern for several years.

With Associate Katharine Cullen and paralegal Chris Hermanson recently joining Dillon Grube, LLC, our team is well-rounded, efficient, and ready to take on your legal matter.