Atty. Douglas E. Onsi

Atty. Douglas E. Onsi

Douglas E. Onsi is a lawyer.

Cambridge Cambridge 33 yrs experience 33 year
Call (857) 416-1942 Book Appointment

Attorney · Serving Cambridge, MA · 33+ Years Experience

Profile Summary

About Douglas E. Onsi at a Glance

Douglas E. Onsi is a HealthCare Ventures LLC based in Cambridge, Massachusetts. They have 33+ years of legal experience, licensed to practice since 1993. Admitted to practice in Massachusetts (1993). Educated at University of Michigan (J.D., 1993) and Cornell University (B.S., 1990). Serves clients in Cambridge, MA and the surrounding metropolitan area.

Verified attorney profile · Updated October 2026

About Douglas E. Onsi

  • Douglas E. Onsi is a lawyer
  • Douglas received a B.S. degree from Cornell University in 1990, and has been licensed for 33 years
  • Douglas practices in Cambridge, MA

Jurisdictional Context

Why Local Counsel Matters in Cambridge

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

Cambridge Courts and Legal Process

Choosing a Cambridge-based attorney means your counsel already knows the local docketing timelines, preferred filing formats, and how individual judges typically rule on procedural motions — details that only come from practicing in this jurisdiction day after day. That local familiarity can translate to better strategy, faster filings, and fewer costly surprises.

Looking for additional Massachusetts attorneys? Browse all attorneys in Cambridge or all attorneys in Massachusetts.

Frequently Asked

Common Questions About Douglas E. Onsi

Where is Douglas E. Onsi's law office located?
Douglas E. Onsi's law practice is located in Cambridge, Massachusetts. You can contact the office directly through this profile page.
How long has Douglas E. Onsi practiced law?
Douglas E. Onsi has 33+ years of legal experience and has been licensed since 1993.
Where did Douglas E. Onsi go to law school?
Douglas E. Onsi earned their education at (J.D., 1993); (B.S., 1990).
How can I contact Douglas E. Onsi for a consultation?
You can contact Douglas E. Onsi 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.

Professional Profile

Why Clients in Cambridge Choose Douglas E. Onsi

Selecting an attorney is one of the most consequential decisions you can make when a legal matter arises. Below are the core qualities that distinguish Douglas E. Onsi's practice.

Decade-Tested Legal Experience

Douglas E. Onsi brings 33+ years of hands-on legal practice — enough to have navigated the recurring fact patterns, procedural traps, and negotiation dynamics that shape case outcomes.

Local Presence in Cambridge

A Cambridge-based practice means Douglas E. Onsi attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.

Search Reference

How People Find Douglas E. Onsi Online

Prospective clients searching for legal help in Cambridge commonly use a combination of the attorney's name and their specific legal need. The following search terms frequently lead people to this profile and to attorneys like Douglas E. Onsi.

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If any of the above matches what you searched for, you've found the right profile. Use the contact options at the top of this page to get in touch with Douglas E. Onsi directly.

Education & Law School Background

J.D.
University of Michigan
- 1993
B.S.
Cornell University
- 1990

Bar Admissions & Licensed Jurisdictions

Massachusetts
Admitted: 1993

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