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Contact
Email
ddiemer@tclaw.net
Phone
(877) 930-0964
Address
3610 Fourteenth Street, Riverside, CA, 92502, US
Professional
About
Derek M. Diemer is a seasoned tax attorney with over 20 years of dedicated experience, serving clients from his office at Thompson & Colegate LLP in Riverside, California. Specializing exclusively in tax law, Derek has honed his expertise to provide comprehensive legal solutions for individuals and businesses navigating the complexities of the tax code. His deep understanding of tax regulations and strategic approach to tax planning and compliance make him an invaluable asset to clients seeking to optimize their financial standing while minimizing legal risks. At Thompson & Colegate LLP, Derek is known for his meticulous attention to detail and his unwavering commitment to client success. He takes pride in delivering tailored legal strategies that align with each client's unique needs and goals. Whether advising on corporate tax matters, representing clients in tax disputes, or assisting with estate planning, Derek's approach is characterized by clear communication, thorough analysis, and a proactive outlook. His ability to anticipate potential challenges and craft innovative solutions has earned him a reputation as a trusted advisor and advocate. Derek M. Diemer's dedication to excellence extends beyond his practice, as he remains actively engaged in ongoing professional development to stay at the forefront of tax law. This commitment ensures that his clients benefit from the most current legal insights and strategies. At Thompson & Colegate LLP, Derek's leadership in the tax practice underscores the firm's dedication to providing high-caliber legal services. Clients can rely on his expertise to guide them through the intricacies of tax law with confidence and precision.
About Tax Law
Tax attorneys help individuals and businesses with tax planning, compliance, and disputes with tax authorities. They work to minimize tax liability and resolve IRS issues. Common matters include tax planning, irs audits, tax disputes, business tax.
Credentials
Education
2020 California Western School of Law JD - Juris Doctor 2017 California Polytechnic State University, San Luis Obispo BA - Bachelor of Arts
Languages
English
Recognition & Involvement
Awards
2020 Outstanding Service Award, Legal Aid Society of San Diego 2019 Award for Academic Excellence, California Western School of Law
Publications
2021 California Western Law Review Destroying Ourselves: Is it Time to Find an Alternative to the Gas Tax? 2020 American University Intellectual Property Brief Hiding Actualities: Whether Art Should Exist Independent of the Artist 2019 Taylor & Francis: Information & Communications Technology Law Fighting giants: using standard form contracts to protect the industry outsider
Associations
2022 - Present Riverside County Bar Association Member 2022 - Present San Bernardino County Bar Association Member 2022 - Present Los Angeles County Bar Association Member
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Updated: Jul 03, 2026