Atty. Robert E Mannion, Sr.
Robert E Mannion, Sr. is a lawyer practicing financial institutions, international, regulatory. Robert received a A.B. degree from Georgetown University in 1965, and has been licensed for 57 years.
Financial Institutions & More Attorney · Serving Washington, DC · 57+ Years Experience
Profile Summary
About Robert E Mannion, Sr. at a Glance
Robert E Mannion, Sr. is a Retired Partner based in Washington, District of Columbia, practicing at Arnold And Porter Llp. They have 57+ years of legal experience, licensed to practice since 1969. Their practice focuses on international. Admitted to practice in District of Columbia (1969) and U.S. Supreme Court (1976). Educated at Columbus School of Law of The Catholic University of America (J.D., 1969) and Georgetown University (A.B., 1965). Recognitions include AV Preeminent. Active member of The District of Columbia Bar American and Federal Bar Associations. Serves clients in Washington, DC and the surrounding metropolitan area.
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About Robert E Mannion, Sr.
- Robert E Mannion, Sr. is a lawyer practicing financial institutions, international, regulatory
- Robert received a A.B. degree from Georgetown University in 1965, and has been licensed for 57 years
- Robert practices at Arnold & Porter LLP in Washington, DC
Practice Areas Explained
Robert E Mannion, Sr.'s Areas of Legal Practice
Each practice area below reflects the types of cases Robert E Mannion, Sr. handles, with a practical overview of what that area of law involves and how it may apply to your situation in Washington.
International Law in Washington
International law attorneys for cross-border transactions, trade, foreign investment, and treaties.
Robert E Mannion, Sr. is one of 39,787 international attorneys indexed nationally. Browse international attorneys in District of Columbia →
Jurisdictional Context
Why Local Counsel Matters in Washington
Practicing law in District of Columbia. Legal matters in District of Columbia are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Washington are typically filed in the local municipal court or the appropriate District of Columbia state district court, depending on subject matter and amount in controversy. An attorney licensed in District of Columbia 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 District of Columbia courts without local counsel or pro hac vice admission.
Washington Courts and Legal Process
Choosing a Washington-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 District of Columbia attorneys? Browse all attorneys in Washington or all attorneys in District of Columbia.
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Professional Profile
Why Clients in Washington Choose Robert E Mannion, Sr.
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 Robert E Mannion, Sr.'s practice in the field of international.
Decade-Tested Legal Experience
Robert E Mannion, Sr. brings 57+ years of hands-on legal practice — enough to have navigated the recurring fact patterns, procedural traps, and negotiation dynamics that shape case outcomes.
Multi-State Bar Admission
Licensed in District of Columbia and U.S. Supreme Court, Robert E Mannion, Sr. can represent clients in cases that span state lines or require counsel in multiple jurisdictions.
Focused International Practice
Concentrating on international means Robert E Mannion, Sr.'s knowledge of relevant statutes, case law, and procedural nuances stays current — unlike generalist practices that spread attention across unrelated fields.
Local Presence in Washington
A Washington-based practice means Robert E Mannion, Sr. attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.
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Robert E Mannion, Sr.'s Practice Areas & Specializations
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