Guillermo San Antonio-Acha, Business Attorney in the United States
Over 26 years of legal practice · focused on Business, Car Accidents, and General · 3.8/5 rating from 1 verified client review
MemberatGSA Law, LLC
Practicing business since 2000.
- 26+
- Years practicing
- 3.8 ★
- 1 client review
- 1
- Bar admission
Are you Guillermo San Antonio-Acha?
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Quick answer
Guillermo San Antonio-Acha is a member based in San Juan, PR. The practice focuses on Business, Car Accidents, and General. Guillermo has over 26 years of legal experience. Currently practicing at GSA Law, LLC. Rated 3.8 out of 5 from 1 client review.
- Based in
- San Juan, PR
- Experience
- over 26 years
- Known for
- Business · Car Accidents · General
- Handles Business, Car Accidents, and General matters from San Juan, PR.
- Over 26 years of practice as a licensed attorney.
- Recognized with Peer Reviewed.
About Guillermo San Antonio-Acha: Guillermo San Antonio-Acha is a member based in San Juan, PR. The practice focuses on Business, Car Accidents, and General. Guillermo has over 26 years of legal experience. Currently practicing at GSA Law, LLC. Rated 3.8 out of 5 from 1 client review.
Areas of practice
Guillermo's practice areas in the U.S.
Guillermo concentrates on business, car accidents, general, health care, and medical malpractice. Each area below outlines the kind of case Guillermo handles, typical outcomes to expect, and how the intake process starts.
Business
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Car Accidents
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General
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Health Care
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Medical Malpractice
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Motorcycle
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Personal Injury
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Product Liability
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Real Estate
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IP
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Business cases nationwide
Guillermo takes business matters nationwide. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Guillermo agrees to represent you.
Car Accidents cases nationwide
Guillermo takes car accidents matters nationwide. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Guillermo agrees to represent you.
General cases nationwide
Guillermo takes general matters nationwide. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Guillermo agrees to represent you.
Health Care cases nationwide
Guillermo takes health care matters nationwide. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Guillermo agrees to represent you.
Medical Malpractice cases nationwide
Guillermo takes medical malpractice matters nationwide. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Guillermo agrees to represent you.
Biography
Guillermo San Antonio-Acha, business attorney serving the U.S.
Guillermo San Antonio-Acha is a member based in San Juan, PR. The practice focuses on Business, Car Accidents, and General. Guillermo has over 26 years of legal experience. Currently practicing at GSA Law, LLC. Rated 3.8 out of 5 from 1 client review. Guillermo works from the U.S. and takes on business matters across the region.
Guillermo San Antonio-Acha is a lawyer practicing commerce, business law, corporate law and 7 other areas of law. Guillermo received a B.A. degree from University of Puerto Rico in 1996, and has been licensed for 26 years. Guillermo practices at GSA Law, LLC in San Juan, PR.
How Guillermo handles business matters
Guillermo San Antonio-Acha is a lawyer practicing commerce, business law, corporate law and 7 other areas of law. Guillermo received a B.A. degree from University of Puerto Rico in 1996, and has been licensed for 26 years. Guillermo practices at GSA Law, LLC in San Juan, PR.
The kind of cases Guillermo takes
Guillermo reviews new inquiries case-by-case for business, car accidents, and general matters in the United States.
Credentials
Credentials — where Guillermo studied and practices
Columbia Law School
LL.M. University · 2001
University of Puerto Rico
B.A. · 1996
Jurisdictions
Guillermo's state bar admissions
Puerto Rico
2000 · ACTIVE
Guillermo studied at LL.M. University in Columbia Law School and B.A. in University of Puerto Rico.
Law school and academic background
Guillermo completed LL.M. University in Columbia Law School and B.A. in University of Puerto Rico. Formal legal training is one signal of substantive knowledge — the day-to-day practice Guillermo runs in the state is where that training gets applied to real client questions.
Recognition
Guillermo's legal honors and published work
Guillermo has received 1 formal recognition from bar associations, industry bodies, and peer-review services.
Peer Reviewed
Legal awards and honors
Peer Reviewed.
Affiliations
Guillermo's professional memberships and bar associations
Puerto Rico Federal Bar
membership
Locations
Guillermo San Antonio-Acha's office in San Juan
Guillermo's primary office is at 308 Avenue De Diego, Puerto Nuevo, Suite 300, San Juan, PR, 00920. In-person meetings are by appointment; a phone intake usually comes first.
GSA Law, LLC
308 Avenue De Diego, Puerto Nuevo, Suite 300
San Juan, PR 00920
Open in Google MapsClient feedback
Client reviews of Guillermo San Antonio-Acha — 3.8/5 rating from 1 verified client review
Every review below is from a verified client of Guillermo. Reviews cover communication, case outcome, and value — the three signals that matter most when comparing business attorneys in your area.
3.8
1 client review
Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once Guillermo San Antonio-Acha claims this profile.
Read all reviewsHiring guide
How to hire Guillermo San Antonio-Acha — what to expect in your first consultation
Working with a new business attorney should feel structured. Here's how the first two conversations with Guillermo usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
Guillermo charges for the initial consult. That fee is credited toward representation if you retain Guillermo's office.
What to bring to your first meeting
Bring any documents you already have — police reports, medical records, filed pleadings, correspondence from an insurer, a copy of the contract at issue. If you're not sure, err on the side of bringing everything; Guillermo will tell you what matters and what doesn't.
Questions to ask a business attorney in your state
A short list to run through before you commit: How many business matters have you handled in the last year? What's your fee structure? Who else in the office will work on this? What's your realistic estimate of timeline and range of outcomes? How do I reach you between meetings?
Fees & payment
Fees, payment methods, and consultation options for Guillermo
Guillermo discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in business practice — ask which fits.
Hourly rates, contingency fees, and flat-fee options
Every business matter is priced differently. Simple document review might be a flat fee. Injury litigation is often contingency. Complex commercial disputes usually run hourly with a retainer. Guillermo confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
Guillermo's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many business practices work with clients on structured schedules.
Frequently asked
Frequently asked questions about Guillermo San Antonio-Acha
How much does it cost to hire Guillermo for a business case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Guillermo walks through the likely range during the consult so there are no surprises.
Does Guillermo offer a free consultation?
Guillermo charges for the initial consult; that fee is credited toward representation if you retain Guillermo's office. Some business attorneys offer free consults — check Guillermo's current terms during booking.
How long do business cases in this state typically take?
Simple business matters can wrap in a few weeks; disputed cases can run 6–18 months from intake to resolution, longer if the matter goes to trial. Guillermo gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can Guillermo take my case if I'm outside the area?
Guillermo evaluates matters case by case. If the venue is outside Guillermo's regular jurisdictions, the intake call will confirm whether direct representation or a referral makes more sense.
What should I bring to my first meeting with Guillermo?
Bring every document that touches the dispute: contracts, correspondence, police or medical reports, filed pleadings, invoices, photographs, insurance letters. Also bring a written timeline of what happened, in your own words. Guillermo will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is Guillermo accepting new business clients right now?
Guillermo's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.