An Update from Diemer & Wei about COVID-19

Our law firm remains fully operational and committed to serving our clients and colleagues throughout the Coronavirus (COVID-19) crisis. As we follow the CDC guidelines and practice social distancing, we remain available for phone consultations and remote meetings with both current and prospective clients and colleagues. Please contact our office by email or by calling  2020 04 06 11 15 48  with any questions. We look forward to hearing from you.

diemer wei llp san jose

diemer wei llp san jose california






Skilled Legal Counsel For Individuals and Businesses

At the San Jose law firm of Diemer & Wei, LLP, our attorneys provide skilled legal counsel designed to achieve efficient, cost effective resolutions.



10.0Julia Ming Hua Wei

San Jose Business Litigation, Real Estate & Bankruptcy Law Attorneys

Serving Clients With Integrity and Commitment Since 2003

Since 2003, Diemer & Wei, LLP, has focused on protecting businesses and individual clients in commercial disputes, real estate matters and in business litigation. Our lawyers handle each business dispute, employment claim, real estate and bankruptcy matter individually and on its own terms. The decades of experience we have to offer, combined with our proven ability to litigate in any appropriate forum, fosters creative solutions to the diverse legal problems our clients face. In short, our knowledge, our focus and our experience can help you solve your legal problems efficiently and cost-effectively. For solutions to the critical legal problems you or your business is facing today, contact our San Jose law offices for an initial consultation.

Mary Grace Guzmán

San Jose, California

Mary Grace Guzmán represents attorneys and attorney applicants before the State Bar of California. She also advises law firms clients on legal ethic issues such as conflict of interest issues, fee disputes. She also acts as outside ethics counsel for law firms. Mary Grace provides MCLE courses on Legal Ethics, Competency, and the Elimination of Bias. She is on Contra Costa County’s Bar Associations Diversity Committee, Barristers Section Board and former Co-chair of Contra Costa County Bar Association’s Committee of Delegates.

Mary Grace has been named to the Northern California Super Lawyers Rising Star for Professional Liability since 2015.

Mary Grace graduated from the University of California, Berkeley with a Bachelor’s degree in Anthropology and a minor in Chicano/a Studies in 1996. After working as a teacher, Mary Grace returned to law school and obtained her Juris Doctorate from Santa Clara Law with a certificate in Social Justice in 2008.

Areas of Practice

Legal Ethics

State Bar Defense

Moral Character Representation

Bar Admissions

California, 2010


Santa Clara Law

J.D. - 2008

University of California, Los Angeles

Bachelor's Degree - B.A. – Anthropology, 1996


“Rule 1.18: Guess what? You have a duty to prospective clients,” Contra Costa Lawyer Magazine, February 2019.

“Lawyers Get Crafty,” contributed journal slide, American Bar Association Journal Website, January 2018.

“A Local Lawyer’s Thoughts on Last Month’s Tragedies,” Contra Costa Bar Lawyer Magazine, August 2016.

“Where Do I Deposit My Retainer?” MCLE Self Study: Contra Costa County Bar Association MCLE Spectacular, November 2011.

“Moral Character: The Other Bar Exam,” The Advocate, with Lindsay Kohut Slatter, April 2013.


08 May 2020
Since the outbreak of COVID-19 began, business as usual has been disrupted. As a result of various g...
08 April 2020
California Judicial Council Adopts New Rules to Lower Jail Population, Suspend Evictions and Foreclo...
06 April 2020
by Henry Chuang and Julia M. Wei            I...
  • Our Skilled Legal Team

    Based in San Jose, California, but serving the interests of businesses and individual clients throughout Silicon Valley and the Bay Area — Diemer & Wei, LLP, offers effective advice, dispute resolution services and courtroom representation in matters involving business, employment law and both business and personal bankruptcies. Read More
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