Over the years, Ben has won numerous million and multi-million dollar recoveries for his clients who trusted him to represent them following horrible and traumatic events.
In his practice, Ben has successfully represented individuals and families in cases against large corporations, against cities and counties, the State of California and against the United States. Ben has litigated in state and federal court and has argued before the California Supreme Court, Third District Court of Appeal and the United States Court of Appeals for the Ninth Circuit. He has earned a “superb” rating by the attorney rating service, AVVO–the highest rating possible—and has been recognized as a “Top 40 under 40” by the National Trial Lawyers.
Ben's cases have appeared in both local and national news, including featured stories in the Los Angeles Times, Sacramento Bee, Redding Record-Searchlight, and Eureka Times-Standard. He has also appeared on both Fox News and NBC News.
Before entering civil practice, Ben served as a deputy district attorney at the Humboldt County District Attorney’s Office. While at the District Attorney’s Office, Ben prosecuted a wide variety of crimes including crimes of violence, crimes involving sexual abuse, crimes of theft and crimes related to animal abuse. He was also responsible for leading a complex multi-year criminal investigation that culminated in a special criminal grand jury indictment.
Ben graduated with general honors from the University of Chicago with a degree in Political Science and from the Vanderbilt University Law School.
Ben lives in Humboldt County with his wife, who is also a lawyer, and two children.
25%-40%
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Chat withState: California
Acquired: 2008
No misconduct found
305 K Street, Eureka, CA, 95501
Showing 1 - 5 of 5 client reviews from Avvo
Posted by anonymous | June 18, 2019 | Hired Attorney
Ben is your guy. I had another lawyer before hiring Ben, and that was my mistake. This other lawyer was well known in the local Humboldt community but honestly he didn't actually do much other than tell me how much experience he had, and then told me he had a "conflict" and told me he couldn't repr...
Posted by anonymous | November 2, 2016 | Consulted Attorney
Ben is an exceptional attorney who aggressively represents his clients. He prepares his cases thoroughly and clearly puts the interests of his clients first. Ben is an extremely ethical, honest attorney who enjoys an excellent reputation in the community. I would highly recommend Ben in a personal...
Posted by Karen | October 22, 2016 | Hired Attorney
Ben represented me on a personal injury case. I always felt like he knew what he was doing and he always made sure to let me know what was going on. He never sugarcoated anything, was honest about the good parts of my case and the bad parts, and made sure I was ready for my deposition. Even when I...
Posted by anonymous | October 10, 2016 | Consulted Attorney
Mr. Mainzer is an excellent advocate for his clients. He is honest and friendly while remaining a zealous advocate for his clients. If I were in need of representation in Northern California I would have no hesitation in reaching out to Mr. Mainzer and I know he would work aggressively to obtain th...
Posted by anonymous | March 7, 2014
Mr. Mainzer is an outstanding attorney. He has a gift for oral argument, and does a thorough job with legal research. His enthusiasm and his positive attitude make him a formidable advocate in the courtroom. I would hire Mr. Mainzer for any civil matter, and recommend him to anybody seeking profes...
"Ben and I worked on complicated personal injury matter representing our clients against a large governmental entity. Ben worked hard for his client to develop all the evidence relevant to liability, causation and damages including various experts. He was aggressive in his representation while maintaining a high level of professionalism and he obtained an excellent disposition in this case."
"Ben and I recently were on opposite sides of a complicated wrongful death case with challenging factual and legal issues. Ben did an excellent job working the case up and did an outstanding job for his clients. Although this was a highly contested case, Ben was professional, courteous and straightforward to deal with on this case. Ben handled this case the way all litigators should handle their cases, with professionalism, courtesy and thoroughness. I was very impressed with the way Ben handled this case and give him a full and complete endorsement as a personal injury attorney, ."
"Ben and I recently litigated a large personal injury case against each other. He represented himself and his client well and remained professional throughout the process. It was a pleasure to interact with him and I hope we have the opportunity to work together again. It is always refreshing to deal with opposing counsel who can effectively represent his client while also being professional and a pleasure to be around."
"Ben and I worked together at the District Attorney's office. Ben had excellent results as a litigator, and Ben has a great sense of humor. North Coast residents are lucky to have Ben on their side."
"Ben is a large part of the future of civil practice in Humboldt County. He believes deeply in the matters that he takes on and his successes are a tribute to his hard work and problem solving abilities."
"Ben is a rising star in the Humboldt County personal injury arena. Beginning as a Deputy District Attorney he distinguished himself as a diligent prosecutor with a firm command of his caseload and a well regarded sense of fairness."
"I endorse this lawyer. I had the pleasure of working with Ben on a heavily defended sexual harassment case over a period of nearly two years. I was most impressed with Ben's preparation, his rapport with clients, his grasp of the law and his litigation skills. Due largely to Ben's exellent work, we were able to obtain an excellent result for our clients."
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2023
Top 20 Settlement, California, TopVerdict
2018
Top 40 Under 40, National Trial Lawyers
2007
Top Litigator, Vanderbilt University Law School Mock Trial Board
2022 - Present
Partner, Law Office of Benjamin Mainzer, APC
2020 - 2022
Partner, Reiner, Slaughter, Mainzer & Frankel, LLP
2011 - 2020
Partner, Bragg, Mainzer & Firpo, LLP
2009 - 2011
Deputy District Attorney, Humboldt County District Attorney
2009 - Present
Humboldt County Bar Association
7,000,000
$1.0 million recovery
Affirmed
$1.1 million recovery
$1.525 million
2008
JD - Juris Doctor
2005
BA - Bachelor of Arts
2023
2023
2023
2023