JM
John William McKenzie
John William McKenzie is a lawyer in Alexandria, VA who works for Costin Marcus PLLC. Court admissions include District of Columbia District Court, Sixth Circuit Court of Appeals. Licensed in Texas since 2008. Graduated from Indiana University School of Law in 2008.
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Law school
Bar admission
Office
Disciplinary
JM
John William McKenzie
Costin Marcus PLLCAlexandria, VA·17 years licensed
Claim profileContact attorney
John William McKenzie is a lawyer in Alexandria, VA who works for Costin Marcus PLLC. Court admissions include District of Columbia District Court, Sixth Circuit Court of Appeals. Licensed in Texas since 2008. Graduated from Indiana University School of Law in 2008.
Law school
Indiana University School of Law
Class of 2008
Bar admission
2008
State Bar of TX · No. 24065723
Office
908 King St Ste 330
Alexandria, VA 22314
Disciplinary
None on record
Clean since admission
Career history
2 observed firms
Based on State Bar of Texas snapshots — each row is a firm the attorney was registered with at one of our quarterly pulls.
- Loewinsohn Deary Simon Ray LLP.AS OF MAY 2023Private Law Practice · Dallas, TX
- Costin Marcus PLLCAPR 2026 — PRESENTPrivate Law Practice · Alexandria, VA
Case data
Case data
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Practice & jurisdiction
Courts admitted
- District of Columbia District Court
- Sixth Circuit Court of Appeals
- Texas Eastern District Court
- Texas Northern District Court
- Texas Southern District/Bankruptcy Court
- Texas Western District Court
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Last refreshed Jun 2026