Atty. John Sun
John Sun represents a broad range of clients in securities and financing transactions, including asset-backed secured lending, purchase and sale of whole loans, warehouse facilities and public and private offerings of securities backed by residential mortgages and automobile receivables. John represents financial institutions in different types of financing transactions that are backed by pools of assets, including residential mortgages and automobile receivables.
Banking And Finance Law Attorney · Serving Washington, DC · 14+ Years Experience
Profile Summary
About John Sun at a Glance
John Sun is a business attorney based in Washington, District of Columbia, practicing at Katten. They have 14+ years of legal experience, licensed to practice since 2012. Admitted to practice in Pennsylvania, Pennsylvania Bar Association (2012) and District of Columbia, The District of Columbia Bar (2015). Educated at Cornell University (J.D., 2012). Recognitions include Best Lawyers in America — Banking and Finance Law (2026). Serves clients in Washington, DC and the surrounding metropolitan area.
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About John Sun
- John Sun represents a broad range of clients in securities and financing transactions, including asset-backed secured lending, purchase and sale of whole loans, warehouse facilities and public and private offerings of securities backed by residential mortgages and automobile receivables
- John represents financial institutions in different types of financing transactions that are backed by pools of assets, including residential mortgages and automobile receivables
- He helps companies secure financing using these assets so they can continue to run their businesses
- John understands his clients' needs and helps ensure that the transactions close on time
- John has experience in mortgage originations, so he has a deeper understanding of the issues and risks involved with mortgage assets
Practice Areas Explained
John Sun's Areas of Legal Practice
Each practice area below reflects the types of cases John Sun handles, with a practical overview of what that area of law involves and how it may apply to your situation in Washington.
Business & Corporate Law in Washington
Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.
John Sun is one of 497,491 business attorneys indexed nationally. Browse business 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 John Sun
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 John Sun's practice in the field of business.
Decade-Tested Legal Experience
John Sun brings 14+ 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 Pennsylvania, Pennsylvania Bar Association and District of Columbia, The District of Columbia Bar, John Sun can represent clients in cases that span state lines or require counsel in multiple jurisdictions.
Focused Business Practice
Concentrating on business means John Sun'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 John Sun attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.
Case Types
Common Legal Issues John Sun Handles in Washington
Below is a representative sample of the types of matters John Sun has experience with under District of Columbia law. If your situation involves one of these case categories, this attorney may be well positioned to help you understand your options.
This list is illustrative, not exhaustive. Contact John Sun directly to discuss the specifics of your situation.
Search Reference
How People Find John Sun Online
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John Sun's Practice Areas & Specializations
Education & Law School Background
Awards & Professional Honors
Bar Admissions & Licensed Jurisdictions
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