Meet Our Team

Our team delivers high-quality and transparent legal representation devoted to achieving your best outcome.

We offer services in both official languages.

Adam T. CastonguaySamantha C. M. Prescott

Ronald V. TrebbLeighton T. Roslyn

Looking for a member of our Support Team?

Adam T. Castonguay

B.A. Hons., J.D.



Adam is a graduate of Laurentian University where he obtained a Bachelor of Arts in Law and Justice with honours, cum laude, and the Bora Laskin Faculty of Law at Lakehead University where he earned his Juris Doctor with first class standing.  He also holds a Certificate in Construction Law from York University’s Osgoode Hall Law School Professional Development. He practices real estate and property law, construction law, civil litigation and dispute resolution as well as corporate and commercial law.

You can trust Adam to provide expert advice in real estate transactions, including those involving commercial properties and multi-family or income properties. He can also assist with refinancing, liens, disputes over boundaries or access, and more.

In his construction law practice, he represents owners, general contractors, sub-contractors and suppliers for matters ranging from construction liens to contract advice and negotiations.

In addition to construction and property disputes, Adam represents clients in a variety of litigation matters such as shareholder disputes, breach of contract, and wrongful termination claims. Wherever possible, we will explore resolutions without the need to resort to the courts.
Working with established businesses and budding entrepreneurs, Adam advises on corporate and commercial matters including incorporating and corporate reorganizing, asset and share purchasing, and commercial leasing.

Adam’s client-centric approach makes him a great addition to your team, where he will work with you and the other lawyers at Conroy Scott LLP to meet all your legal needs.

Practice Areas:

  • Real Estate Law
  • Property Law
  • Construction Law and Construction Liens
  • Civil Litigation
  • Employment Law
  • Corporate and Commercial Law

Bar Admission: Ontario – 2018

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Samantha C. M. Prescott

B.A. (Hons), B. Ed., J.D.



Samantha obtained a Bachelor of Arts (Honours) degree, as well as a Bachelor of Education degree, from Laurentian University in Sudbury, Ontario. She completed her Juris Doctor at the Bora Laskin Faculty of Law at Lakehead University in Thunder Bay, Ontario, in 2017. Samantha was called to the Ontario Bar in January of 2018.

Samantha began her legal career in Thunder Bay, Ontario in 2016 where she worked for a mid-sized full-service law firm. Samantha has significant litigation experience at all levels of court and has successfully argued motions and trials before the Ontario Court of Justice, the Superior Court of Justice, and the Divisional Court. Samantha’s main areas of practice include family law, child protection law, human rights law, real estate, wills and estates, and estate litigation. Samantha also has significant experience with various matters at the appellate level and has worked on appeals before the Superior Court of Justice, the Court of Appeal of Ontario, and the Supreme Court of Canada.

Samantha is passionate about working with children and families. She began her career in Sudbury as a teacher with the Rainbow District School Board (RDSB) where she taught French-immersion students at the primary and junior levels. She continues to supply teach with the RDSB and continues to be involved in the field of education as a long-time volunteer with the Ontario Justice Education Network (OJEN). Samantha is also a member of the Board of Directors of the Sudbury Action Center for Youth (SACY).

Practice Areas:

  • Family Law
  • Child Protection/Welfare Law
  • Human Rights Law
  • Civil Litigation
  • Real Estate
  • Wills & Estates
  • Estate Planning
  • Estate Litigation
  • Administrative Law
  • Appeals

Bar Admission: Ontario – January 2018

Ronald V. Trebb

B.Sc., LL.B.



Ronald V. Trebb is a graduate of both Laurentian University (1975) where he obtained a B.Sc (in physics), and also the University of Windsor (also 1975) where he obtained his Bachelor of Laws degree (LL.B). He was called to the Ontario Bar in 1977 and has practiced as a partner of the firm since 1978.

Ron’s present practice focuses primarily upon various aspects of corporate/commercial law. He provides services related to the incorporation, organization, re-organization, amalgamation and dissolution of corporation. He also advises his clients with respect to asset purchase and share purchase type transactions, franchising and licensing arrangements, shareholder agreements and other corporate governance issues His practice also encompasses the provision of necessary professional services to a number of Professional Corporations incorporated for physicians, dentists, barristers and solicitors and other professionals.

In addition, for the better part of 35 years Ron has been active as both a Barrister and Solicitor in all aspects of commercial and residential real estate law. As a barrister, he has been involved in numerous litigious matters between vendors and purchasers, contractors and sub-contractors, principals and agents, and builders and their customers. He has acted for both lenders and borrowers in foreclosure actions, powers of sale proceedings, and other mortgage/security enforcement proceedings. As a solicitor, he has represented clients in numerous major asset acquisitions, asset dispositions, re-financing, leasing, and property development transactions.

Ron has given special lectures at Laurentian University and Cambrian College in Sudbury. He was previously accredited and taught Real Estate Law to real estate agents seeking provincial certification through the Ontario Real Estate Association in various locations throughout Ontario.

Practice Areas

  • Corporate & Commercial Law
  • Wills & Estates
  • Real Estate

Bar Admission: Ontario – 1977

Leighton T. Roslyn

B.A. Hons, LL.B.



Leighton T. Roslyn has been associated with the firm since 2001.

He has over 40 years of experience in corporate and commercial transactions, real estate, wills & estates, powers of attorney, as well as the law related to charities and non-profit organizations.

He also has a depth of experience in litigation matters involving insurance work, contract disputes, construction liens and construction law, real estate disputes, commercial and business law disputes and general Court related issues.

Non-profit and charitable organizations are a special interest.

Practice Areas

  • Litigation General & Corporate/Commercial
  • Corporate/Commercial Transactions
  • Real Estate
  • Wills & Estates

Bar Admission: Ontario – 1979

Our Support Team

  • Carolyn Baril
  • Wills & Estates Law Clerk
  • email
  • Donna Caldwell
  • Corporate Law Clerk
  • email
  • Jasmine Jones
  • Real Estate Law Clerk
  • email
  • Michelle Lefebvre
  • Administrative Clerk
  • email
  • Dorothy Machum
  • Chief Administrative Officer
  • email
  • Sandra Tessier
  • Receptionist
  • email

Get in touch with us.

Our office is located at 164 Elm Street, Sudbury, ON P3C 1T7
Closed for lunch:
12:00 – 1:00 p.m. – Monday to Thursday
12:00 – 1:30 p.m. – Friday

Telephone:705.674.6441 Fax:705.673.9567