Atty. John G. Nassos

Atty. John G. Nassos

Mr. John G.

Merrillville Merrillville 36 yrs experience 36 year
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Profile Summary

About John G. Nassos at a glance

John G. Nassos is a NiSource Inc. based in Merrillville, Indiana. They have 36+ years of legal experience, licensed to practice since 1990. Their practice focuses on business, m&a, securities, and energy. Admitted to practice in Illinois (1990). Educated at Northwestern University (J.D., 1990) and Indiana University (B.S., 1987). Serands clients in Merrillville, IN and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mr. John G. Nassos is a lawyer practicing corporate finance, corporate governance, energy and 5 other areas of law
  • John G. received a B.S. degree from Indiana University in 1987, and has been licensed for 36 years
  • John G. practices in Merrillville, IN

Practice Areas Explained

John G. Nassos's Areas of Practice

Each practice area below reflects the types of cases John G. Nassos 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.

John G. Nassos is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Indiana →

Mergers & Acquisitions

John G. Nassos is one of 49,731 m&a attorneys indexed nationally. Browse m&a attorneys in Indiana →

Securities Law

John G. Nassos is one of 64,529 securities attorneys indexed nationally. Browse securities attorneys in Indiana →

Energy & Utilities Law

Energy attorneys for oil & gas, renewables, utility regulation, and energy sector transactions.

John G. Nassos is one of 36,230 energy attorneys indexed nationally. Browse energy attorneys in Indiana →

Jurisdictional Context

Why local counsel matters in Indiana

Practicing law in Indiana. Legal matters in Indiana are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Merrillville are typically filed in the local municipal court or the appropriate Indiana state district court, depending on subject matter and amount in controversy. An attorney licensed in Indiana 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 Indiana courts without local counsel or pro hac vice admission.

Looking for additional Indiana attorneys? Browse all attorneys in Merrillville or all attorneys in Indiana.

Frequently Asked

Common questions about John G. Nassos

Where is John G. Nassos's law office located?
John G. Nassos's law practice is located in Merrillville, Indiana. You can contact the office directly through this profile page.
What practice areas does John G. Nassos handle?
John G. Nassos focuses on business, m&a, securities, energy. Each practice area listed reflects experience handling cases of that type in Indiana.
How long has John G. Nassos practiced law?
John G. Nassos has 36+ years of legal experience and has been licensed since 1990.
Where did John G. Nassos go to law school?
John G. Nassos earned their education at (J.D., 1990); (B.S., 1987).
How can I contact John G. Nassos for a consultation?
You can contact John G. Nassos 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

J.D.
Northwestern University
- 1990
B.S.
Indiana University
- 1987

Bar Admissions

Illinois
Admitted: 1990

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