VerifiedLawFirms editorial: Focus and practice areas — Insurance work sits at the front of what this Baltimore firm handles. The services page opens with insurer bad faith, property coverage, reinsurance and insurance defense…
Each row is a check on this listing. Document checks are reviewed by an editor from evidence the firm submitted and are dated by that review; automatic checks confirm the listing's contact details are present and correctly formatted. Verification is independent of membership tier.
What we verified
How we verified
Status
Last checked
Email addressA working email address is on file for this listing.
Automatically
Confirmed
2026-07-28
AddressThe listed street address resolves to a real location on the map.
Automatically
Confirmed
2026-07-28
Phone numberA phone number in valid US format is listed for this firm.
Automatically
Confirmed
2026-07-28
Automatic checks confirm the listing's contact details are present and correctly formatted. They do not verify the firm's licensure or standing — those are the document checks an editor reviews. How we verify →
About Niles, Barton & Wilmer
Niles, Barton & Wilmer, LLP is a law firm based at 111 South Calvert Street in Baltimore, Maryland. Its site also lists offices in Ocean City, Maryland, and Albany, New York. The firm represents individuals and businesses and organizes its work across insurance, litigation, estates and trusts, real estate, business and employment, representations and warranties, and sports law. Listed services include insurer bad faith, property coverage, reinsurance, insurance defense, construction defects, products liability, professional liability, wrongful death matters, business and commercial litigation, employment, appellate work, and subrogation.
The firm also handles probate services, trust and fiduciary matters, private wealth work, commercial sales and leases, lending and financing, condominium and homeowners association matters, and real estate litigation. Its business services include corporate transactions, mergers and acquisitions, intellectual property, employment law, and securities and compliance. The attorney directory lists 23 lawyers with the titles managing partner, partner, associate, senior counsel, and of counsel. The site identifies the firm as a member of the Law Firm Alliance.
Editor's Review
VerifiedLawFirms editorial
Focus and practice areas
Insurance work sits at the front of what this Baltimore firm handles. The services page opens with insurer bad faith, property coverage, reinsurance and insurance defense. That grouping tells a reader a good deal about the kind of client the firm keeps.
Litigation runs alongside it. The listed matters include construction defects, products liability, professional liability, wrongful death claims, business and commercial disputes, appellate work and subrogation. Employment litigation appears in the same group.
The firm also handles estates and trusts. Probate services, trust and fiduciary matters and private wealth work are all named on the services page. Real estate is a separate line: commercial sales and leases, lending and financing, condominium and homeowners association matters, and real estate litigation.
Business and transactional work
On the business side the firm lists corporate transactions, mergers and acquisitions, intellectual property, employment law, and securities and compliance. Representations and warranties appear as their own category. Sports law is listed too, which is uncommon for a firm of this size and shape.
In my opinion, the combination of insurance coverage work with estates, real estate and corporate transactions points to a firm built around long-running institutional and family clients. Coverage disputes and probate matters both tend to arrive through relationships rather than advertising.
How the team is built
The attorney directory lists 23 lawyers. The titles run across managing partner, partner, associate, senior counsel and of counsel. That is a full ladder, and it suggests the firm brings lawyers in early and keeps senior practitioners on after they step back from full partnership.
Named attorneys on the site include Susan B. Austin, Susan D. Baker, Diane E. DiBlasio, Michele H. Dinterman and Justin S. Dunbar as partners. Brett A. Buckwalter is listed as senior counsel. Brian Peter "Pete" Cosby and Lawrence F. Haislip appear as of counsel.
The associate ranks include Cole E. Baker, Mia M. Bodell, Emily N. Donahoe and Cooper A. Gerus. The site does not carry biographies for these lawyers, so a prospective client will want to ask directly about who would handle a given file.
Offices and reach
Baltimore is the main office. The firm also lists an office in Ocean City, Maryland, and one in Albany, New York. Ocean City is a coastal resort market with heavy seasonal property activity, and Albany puts the firm inside New York's capital and its insurance regulatory orbit.
The firm is a member of the Law Firm Alliance. That is a network of independent firms that refer work to one another across regions and countries. Membership gives a mid-sized firm a route to counsel in places where it has no office of its own.
What insurance and coverage work involves
Since insurance is the firm's most prominent listed area, some general context helps a reader judge fit. Coverage disputes usually begin with a claim denial or a reservation of rights letter from the insurer. The policy language then drives most of what follows.
Bad faith claims are a separate track. Maryland handles first-party property and casualty bad faith claims through an administrative process at the Maryland Insurance Administration before they reach court. Deadlines there are firm, and the administrative record often shapes the later litigation.
Reinsurance work sits further upstream. It concerns the contracts between insurers and the carriers who take on portions of their risk, and disputes often go to arbitration under the treaty terms. Firms that handle reinsurance are usually working for carriers as much as for policyholders.
Defense and subrogation files
Insurance defense means the firm represents an insured party under a policy, with the carrier paying. Subrogation runs the other direction: after an insurer pays a claim, it pursues whoever caused the loss to recover what it paid out. Both appear on the firm's services list.
Construction defect and products liability matters often reach lawyers through this same channel. They tend to involve several parties, expert reports on causation, and long document phases before any trial date.
Estates, trusts and real estate in practice
Probate in Maryland goes through the Register of Wills and the Orphans' Court in the county where the person lived. A personal representative files the will, inventories the estate, settles debts, and distributes what remains. Timelines run in months rather than weeks.
Trust and fiduciary disputes are a different animal. They usually involve a beneficiary questioning how a trustee handled assets, and the accounting records carry most of the weight. Private wealth planning, which the firm also lists, is the work that happens before any of that.
Condominium and homeowners association work covers governing documents, assessment collection, and disputes between boards and owners. Maryland has its own statutes for both, and the rules differ between a condominium regime and an HOA. Ocean City's condominium density makes that office placement sensible for this practice area.
What the listing shows
The firm's site is straightforward. It names its lawyers, sets out its service lines in specific terms, and identifies its office locations and network membership. As a reviewer, I find the specificity of the services page more useful than a general statement of philosophy would be.
What the site does not carry is attorney biographies, law schools or admission years. A prospective client comparing options will need to ask for those. The same goes for the firm's founding year, which the site does not state.
For someone with an insurance coverage question, a contested estate, a commercial property matter or a corporate transaction in Maryland, the listed service lines line up with the work. The firm carries 23 lawyers across three offices in two states and belongs to the Law Firm Alliance.
Additional attorneys named in the directory
Craig D. Roswell is the managing partner identified in the directory. His title makes him the clearest named point of reference for firm leadership. The record assigns no practice description to him, so the listing supports a conclusion about his management role only.
Several partners remain worth identifying. M. David Stallings and Mark J. Stiller each appear with the partner title. Christopher D. Wolf and Jeffrey A. Wothers are listed at the same level. Matthew J. Youssef completes this additional group of named partners.
The associate roster also includes Edward L. Healy IV and Brendan K. McReynolds. Brian D. Muller appears separately as an associate. These names can help a prospective client identify a lawyer whose name appears in an initial communication or case document. The directory provides titles, but it does not connect these particular attorneys with defined service lines in the supplied record.
Melody E. McGrath and Jeremy M. Rountree are listed as of counsel. That designation confirms their formal relationship with the firm, although the record gives no further detail about their assignments. For this reviewer, the distinction matters because a client may encounter an of counsel lawyer in a different capacity from a partner or associate. The title alone does not establish who would supervise a file.
Baltimore contact details
The formal name in the record is Niles, Barton & Wilmer, LLP. Its Baltimore street address is 111 South Calvert Street. That exact address is useful for clients who need to deliver documents, confirm the office named in correspondence or plan an in-person appointment.
The listed telephone number is 410-783-6300. The firm website is https://www.nilesbarton.com/. Together, those details give a prospective client two direct ways to contact the Baltimore office and confirm where an inquiry should go. Because the record does not identify separate telephone numbers for individual lawyers, the main number is the practical starting point for asking which attorney handles a particular matter.
A caller can also use the names and titles above to make a more precise inquiry. If a communication identifies Roswell, Stallings or another attorney, the directory provides enough information to confirm that lawyer's stated position within the firm. It does not supply individual biographies or direct contact information in this record, so those details would need to come from the office.
Client reviews
No client reviews yet.
Be the first to leave a review.
Write a review
Reviews are from clients of the firm. We email you a link to confirm, then an editor checks your review before it appears. Your email stays private.
Brendan K. McReynoldsAssociate
Brett A. BuckwalterSenior Counsel
Brian D. MullerAssociate
Brian Peter “Pete” CosbyOf Counsel
CDChristopher D. WolfPartner
Cole E. BakerAssociate
Cooper A. GerusAssociate
Craig D. RoswellManaging Partner
Craig D. Roswell is an attorney at Niles, Barton & Wilmer, LLP in Baltimore, Maryland. He attended University of Baltimore School of Law and graduated in 1991. He represents clients in matters involving business litigation, insurance coverage, alternative dispute resolution, and business and corporate issues.
DEDiane E. DiBlasioPartner
Diane E. DiBlasio is an attorney at Niles, Barton & Wilmer, LLP in Baltimore, Maryland. Her practice focuses on insurance coverage and civil litigation.
Edward L. Healy IVAssociate
Edward L. Healy IV is an attorney at Niles, Barton & Wilmer, LLP in Baltimore, Maryland. His practice areas include entertainment and sports, business and corporate matters, civil litigation, employment and labor, business litigation, and employment litigation.
Emily N. DonahoeAssociate
Jeffrey A. WothersPartner
Jeremy M. RountreeOf Counsel
JSJustin S. DunbarPartner
Lawrence F. HaislipOf Counsel
MDM. David StallingsPartner
M. David Stallings is an attorney at Niles, Barton & Wilmer, LLP in Baltimore, Maryland. He graduated in 2003 from The University of Maryland School of Law. He handles Estate Planning & Probate matters and also assists clients with Business Litigation and Estate & Trust Litigation issues.
MJMark J. StillerPartner
MJMatthew J. YoussefPartner
Matthew J. Youssef is an attorney at Niles, Barton & Wilmer, LLP in Baltimore, Maryland. He graduated from University of Baltimore School of Law in 2009. He handles Business Litigation matters and also assists clients with Business and Corporate, Intellectual Property, Mergers and Acquisitions, Civil Litigation defense, and Closely Held Business issues. He represents clients in the Baltimore area.
MEMelody E. McGrathOf Counsel
Mia M. BodellAssociate
MHMichele H. DintermanPartner
SBSusan B. AustinPartner
Susan D. BakerPartner
Contact Niles, Barton & Wilmer
Reach this firm directly using the details below. VerifiedLawFirms is a directory, not a referral service, so you contact the firm yourself and we never sit in between.