We Fight for Companies with Strategic Litigation.

Like it’s Personal.

We’ve Seen It All - Serious Business Calls for Serious Lawyers 

Niche for a reason - At O’Keefe & Sullivan, we’re not trying to be everything to everyone. We focus where it matters most to us and the pressure is highest for you. When your business is in crisis, conflict, or on the cusp of change, our firm gets straight to the heart of the problem and fixes it. We're built for moments that matter: When the bank is at the door, a deal is on the line, or litigation is inevitable.

Insolvency & Restructuring

When the wheels are coming off, we don’t panic. We plan.

Insolvency and Restructuring is a core practice area for O’Keefe & Sullivan and the main focus for several of our lawyers and Partners. Our firm and its lawyers are well known in the Canadian insolvency community, with our partners and counsel consistently ranked among the leading ones in the country for Insolvency and Restructuring, Insolvency Litigation, and Financial Services.

Banking & Finance

Detail Oriented. Results Driven.

For two decades our lawyers have been the go-to for clients looking to buy, sell or finance their business. When the numbers are big – and the stakes are bigger – we deliver for you with precision, strategy and the ability to speak finance.

Business Law

Where Economic Growth & Integrity Align.

Business law is one of our key practice areas, and our lawyers are proud to have been involved in some of the largest transactions in Atlantic Canada over the past forty years. At our firm, it’s not about the “big files”, in fact, we pride ourselves on providing expert advice and counsel to small and medium sized businesses, from contractors to comic bookstores. We strive to bring big law firm expertise to the small business community in a way that makes sense for our client’s budget and business goals.

Business & Commercial Disputes

Strategic Counsel. Lasting Partnerships.

No matter how hard you try to avoid them, business disputes will happen from time to time. When they do, you don’t need a firm that plays nice. You need a firm that wins.  

Real Estate & Construction

Real Property. Real Risk. Real Experience.

For over fifteen years, we have served as trusted advisors across a wide range of real estate transactions - Residential and Commercial. Our work spans purchases, sales, and refinancing, as well as land assembly, title rectification, and development projects. We handle everything from negotiating and drafting purchase and sale agreements (including condominium documents), to conveyancing, financing, leasing, and resolving title issues or boundary disputes.

Energy & Natural Resources

High-Stakes Industries Need High-Trust Counsel.

Over the past fifteen years, we have provided strategic advice to clients in the energy and natural resources industry, including extensive experience in project management and commercial negotiations. Our lawyers have been recognized by Lexpert® Magazine as leaders in Energy Law.

Indigenous Law

Building Strong Agreements. Honouring Stronger Traditions.

Over the past decade, we have served as lead commercial counsel to one of Canada’s largest Indigenous groups, gaining deep experience in Indigenous business law. We work with both Indigenous and non-Indigenous partners to build business relationships that support long-term, sustainable Indigenous economic development. We understand the unique needs of Indigenous businesses and focus on delivering practical, culturally informed solutions.

Fisheries & Marine Law

Built For High Stakes & Ready For The Hard Calls.

At O’Keefe & Sullivan, we bring hands-on experience and deep knowledge of marine law to help clients navigate complex decisions in the fishing and marine industry. We offer strategic advice on business structures, tax considerations, and compliance with DFO regulations.

Business Succession, Trust & Estate Planning

Business Agreements That Respect Bigger Stories.

At O’Keefe & Sullivan, we provide thoughtful, personalized guidance to help clients navigate the financial and tax considerations tied to their long-term goals. We believe good tax advice must be tailored as an essential part of a larger financial picture. This approach allows you to focus on growing your enterprise with the confidence that both your corporate and personal tax matters are handled by professionals aligned with your objectives.

  • “O’Keefe & Sullivan gives us that confidence.”

    We were referred to Darren directly – we wanted timely legal guidance and strong representation. Ultimately you are looking for a favorable resolution whether through negotiation or litigation.

    – Rod Paul, Purity Factories Ltd.

  • “This firm will not quit when they represent you.”

    – Peter Byrne, Newport Capital Corporation

  • “I don’t have to question if we are treading the proper path or if we are moving efficiently enough with Darren and his team.”

    The knowledge alone is outstanding. They’re also VERY accessible which is important to me.

    – Kara Barrett, Community Business Development Corporation

  • “The trust I have is the biggest reason.”

    Darren and his team are simply wonderful. They are so knowledgeable and reliable. I know when I open a file with them that I am going to get the best service. I feel that no matter what issue I bring to Darren and his team, they have the knowledge and experience to help navigate through in the most efficient and simple way. I also know if things aren’t as straightforward as I would like that Darren and his team will act to keep my best interest at the forefront.

    – Kara Barrett, Community Business Development Corporation

  • “You have a sense that we have the best with a high level of competence without the arrogance that many big city Lawyers bring.”

    Darren and his team have no BS or lawyer speak. Our favorite part has been how you feel when you know you have competent people who have your back. When they seem to love winning the game and having fun.

    – Carl Sparkes, Jost Wineries Ltd.