Atty. Mark Anthony Jefferis

Atty. Mark Anthony Jefferis

Mark Anthony Jefferis is a lawyer practicing financial markets and services, mergers & acquisitions, corporate governance and compliance and 11 other areas of law. Mark received a B.A. degree from University of Oregon in 1997, and has been licensed for 21 years.

Los Angeles Los Angeles 21 yrs experience 21 year
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Profile Summary

About Mark Anthony Jefferis at a glance

Mark Anthony Jefferis is an Associate based in Los Angeles, California, practicing at Sidley Austin LLP. They have 21+ years of legal experience, licensed to practice since 2005. Their practice focuses on business, real estate, and m&a. Admitted to practice in Nevada (2005), New York (2007), North Carolina (Inactive) (2009), and California (2012). Educated at New York University School of Law (LL.M. University, 2005) and University of Oregon (B.A., 1997). Serands clients in Los Angeles, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark Anthony Jefferis is a lawyer practicing financial markets and services, mergers & acquisitions, corporate governance and compliance and 11 other areas of law
  • Mark received a B.A. degree from University of Oregon in 1997, and has been licensed for 21 years
  • Mark practices at Sidley Austin LLP in Los Angeles, CA

Practice Areas Explained

Mark Anthony Jefferis's Areas of Practice

Each practice area below reflects the types of cases Mark Anthony Jefferis handles, with a brief overview of what that area of law covers.

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

Mark Anthony Jefferis is one of 501,317 business attorneys indexed nationally. Browse business attorneys in California →

Real Estate Law

Real estate attorneys handle home purchases, sales, commercial transactions, title disputes, and landlord-tenant matters.

Mark Anthony Jefferis is one of 316,149 real estate attorneys indexed nationally. Browse real estate attorneys in California →

Mergers & Acquisitions

Mark Anthony Jefferis is one of 49,731 m&a attorneys indexed nationally. Browse m&a attorneys in California →

Jurisdictional Context

Why local counsel matters in California

Practicing law in California. Legal matters in California are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Los Angeles are typically filed in the local municipal court or the appropriate California state district court, depending on subject matter and amount in controversy. An attorney licensed in California brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in California courts without local counsel or pro hac vice admission.

Looking for additional California attorneys? Browse all attorneys in Los Angeles or all attorneys in California.

Frequently Asked

Common questions about Mark Anthony Jefferis

Where is Mark Anthony Jefferis's law office located?
Mark Anthony Jefferis's law practice is located in Los Angeles, California. The firm is Sidley Austin LLP. You can contact the office directly through this profile page.
What practice areas does Mark Anthony Jefferis handle?
Mark Anthony Jefferis focuses on business, real estate, m&a. Each practice area listed reflects experience handling cases of that type in California.
How long has Mark Anthony Jefferis practiced law?
Mark Anthony Jefferis has 21+ years of legal experience and has been licensed since 2005.
Where did Mark Anthony Jefferis go to law school?
Mark Anthony Jefferis earned their education at (LL.M. University, 2005); (B.A., 1997).
How can I contact Mark Anthony Jefferis for a consultation?
You can contact Mark Anthony Jefferis directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Education

LL.M. University
New York University School of Law
- 2005
B.A.
University of Oregon
- 1997

Bar Admissions

Nevada
Admitted: 2005
New York
Admitted: 2007
North Carolina (Inactive)
Admitted: 2009
California
Admitted: 2012

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