Atty. Mark Coldiron
Mark Coldiron is a lawyer practicing environmental and energy law, environmental litigation, energy and complex business litigation. Mark received a degree from University of Oklahoma in 1968, and has been licensed for 54 years.
Energy and Complex Business Litigation & More Attorney · Serving Oklahoma City, OK · 54+ Years Experience
Profile Summary
About Mark Coldiron at a Glance
Mark Coldiron is a Director based in Oklahoma City, Oklahoma, practicing at Ryan Whaley Coldiron Jantzen Peters & Webber PLLC. They have 54+ years of legal experience, licensed to practice since 1972. Their practice focuses on business, litigation, and energy. Admitted to practice in Oklahoma U.S. District Court, Northern District of Oklahoma U.S. District Court, Western District of (1972). Educated at University of Oklahoma (J.D. B.S.Ch.E., 1972) and University of Oklahoma (B.S.Ch.E., 1968). Recognitions include AV Preeminent. Active member of Oklahoma (Member and Chairman, 1993, Natural Resources, Energy and Environmental Law Section) and American Bar Associations. Serves clients in Oklahoma City, OK and the surrounding metropolitan area.
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About Mark Coldiron
- Mark Coldiron is a lawyer practicing environmental and energy law, environmental litigation, energy and complex business litigation
- Mark received a degree from University of Oklahoma in 1968, and has been licensed for 54 years
- Mark practices at Ryan Whaley Coldiron Jantzen Peters & Webber PLLC in Oklahoma City, OK
Practice Areas Explained
Mark Coldiron's Areas of Legal Practice
Each practice area below reflects the types of cases Mark Coldiron handles, with a practical overview of what that area of law involves and how it may apply to your situation in Oklahoma City.
Business & Corporate Law in Oklahoma City
Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.
Mark Coldiron is one of 497,491 business attorneys indexed nationally. Browse business attorneys in Oklahoma →
Civil Litigation in Oklahoma City
Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.
Mark Coldiron is one of 450,751 litigation attorneys indexed nationally. Browse litigation attorneys in Oklahoma →
Energy & Utilities Law in Oklahoma City
Energy attorneys for oil & gas, renewables, utility regulation, and energy sector transactions.
Mark Coldiron is one of 35,985 energy attorneys indexed nationally. Browse energy attorneys in Oklahoma →
Jurisdictional Context
Why Local Counsel Matters in Oklahoma City
Practicing law in Oklahoma. Legal matters in Oklahoma are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Oklahoma City are typically filed in the local municipal court or the appropriate Oklahoma state district court, depending on subject matter and amount in controversy. An attorney licensed in Oklahoma 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 Oklahoma courts without local counsel or pro hac vice admission.
Oklahoma City Courts and Legal Process
Choosing a Oklahoma City-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 Oklahoma attorneys? Browse all attorneys in Oklahoma City or all attorneys in Oklahoma.
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Professional Profile
Why Clients in Oklahoma City Choose Mark Coldiron
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 Mark Coldiron's practice in the field of business, litigation, and energy.
Decade-Tested Legal Experience
Mark Coldiron brings 54+ years of hands-on legal practice — enough to have navigated the recurring fact patterns, procedural traps, and negotiation dynamics that shape case outcomes.
Broad Practice Area Coverage
Covering business, litigation, and energy, Mark Coldiron can address the full spectrum of a client's legal needs without requiring referrals to separate specialists for each issue.
Local Presence in Oklahoma City
A Oklahoma City-based practice means Mark Coldiron 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 Mark Coldiron Handles in Oklahoma City
Below is a representative sample of the types of matters Mark Coldiron has experience with under Oklahoma 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 Mark Coldiron directly to discuss the specifics of your situation.
Search Reference
How People Find Mark Coldiron Online
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Mark Coldiron's Practice Areas & Specializations
Education & Law School Background
Awards & Professional Honors
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