Focused on Complex Property, Corporate, and Financial Matters
Most family lawyers learn about business structures and tax implications on the fly. William built his career in them.
Before founding Cunningham Family Law, he spent years practising corporate and commercial law, mergers and acquisitions, and tax law, working with both international firms and a Tier-1 ranked Canadian tax boutique. He advised on sophisticated corporate structures, cross-border matters, and high-value transactions before bringing that experience to family law.
He founded Cunningham Family Law for a specific reason: clients going through divorce and separation, particularly those with business interests, significant assets, or complex financial situations, deserve a lawyer who actually understands the financial landscape, not one learning it on their file.
What Clients Say About Working With William
In less than five months, he has accomplished more than my previous lawyer did in years. His knowledge of family law, accounting, and related matters is exceptional. I truly felt heard, supported, and guided throughout the process.
J.S.O. · Google ReviewWhat really sets him apart is his respect for his clients’ budgets. He focuses on what actually matters, avoids unnecessary conflict and expense, and provides clear, practical advice. With William, I finally felt confident that my file was in capable hands.
R.P. · Google ReviewWilliam Musani handled my divorce case with passion, care, and intelligence, always taking time to explain each step clearly. He balanced empathy with sharp strategy, making a difficult process feel manageable.
S.C. · Google ReviewMore Client Reviews
He has assisted me with both family law and business matters, always providing clear guidance, professionalism, and strong support when I needed it most. I highly recommend William to anyone looking for a reliable and experienced lawyer.
D.L. · Google ReviewI was able to trust him really quickly, knowing I was in good hands and that we would fight for my cause. I would recommend him to anyone I know. Thank you Will, you saved me so much stress.
J.L. · Google ReviewIf you are seeking genuine advocacy in family law in Alberta, look no further. William is responsive, meticulous, and ensures you fully understand every step. Finally, my file truly mattered and I was respected.
D.R.K. · Google ReviewDetail oriented, sharp and to the point. Strongly recommended.
K.K. · Google ReviewFor the past 18 months he has provided litigation support through my custody and child support case, and having him in my corner has made all the difference. He genuinely cared about achieving the best outcome for my children. I highly recommend him.
A.V.B. · Google ReviewHe is genuinely professional and efficient, he gets things done without unnecessary delays. What truly sets him apart, though, is that he actually cares. He’s genuine, attentive, and fights for his clients with real integrity.
S. · Google ReviewThroughout my separation, he has been incredibly personable, practical, and understanding of my needs and wishes. I always felt that he genuinely listened to me and respected how I wanted to approach things. His support made a difficult process feel much more manageable.
B.R. · Google ReviewFrom the very beginning, he took the time to truly understand the circumstances, explain my options clearly, and make sure I was protected every step of the way. I always felt heard, respected, and confident that he had my best interests at heart.
N.H. · Google ReviewIf you want someone who will challenge your opinion and not just give you what you want to hear, I suggest having a discussion with William.
M.W. · Google ReviewWhat This Means for Clients
The difference between a family lawyer with a corporate background and one without shows up in the details that determine whether a settlement actually protects you long-term.
We read financial statements as comfortably as court filings. We understand corporate structures, tax implications, and valuation methods because we've spent years working with them directly. This means we can identify hidden assets, challenge inaccurate valuations, and develop settlement strategies that account for the full financial picture.
For high-net-worth and complex separations, this matters enormously. The difference between a settlement that looks fair on paper and one that actually is often comes down to whether your lawyer understands how business income flows, how corporate structures can obscure value, and how tax consequences can erode what you thought you were getting.
We handle matters involving:
- Complex property and corporate asset division
- Spousal support involving significant income differences
- Child support for high-income and self-employed parents
- Prenuptial, postnuptial, and cohabitation agreements
- Independent legal advice for separation agreements
- Grey divorce and later-life separation
- Common-law separation


Our Approach to Dispute Resolution
Not every dispute needs a courtroom. William is trained and experienced in mediation and arbitration, negotiation, and collaborative approaches. His background as a corporate negotiator and business executive means he's comfortable in high-stakes situations and knows how to move a file toward resolution efficiently.
When litigation is necessary, we approach it strategically. When it's not, we help clients resolve matters faster, with less cost and less damage to the relationships that still matter, especially when children are involved.
For clients who want guidance without full representation, we also offer legal coaching, strategic advice and document review on an as-needed basis.
Our goal in every file is the same: the best possible outcome with the least unnecessary conflict and cost.
How We Work With Clients
We are responsive, direct, and transparent. Clients know where their file stands, what their options are, and what each option will likely cost. We explain the law in plain language, we answer questions promptly, and we don't bill for every five-minute phone call.
Family law is personal. The financial stakes are often the highest of a client's life, and the emotional weight is real. We take both seriously.
If you're considering separation or need advice on how to plan for divorce, we can help you understand your options before you make any decisions.


Serving Calgary and Surrounding Communities
Cunningham Family Law is based in Beltline Calgary and represents clients across southern Alberta, including Cochrane, Airdrie, Okotoks, Canmore, and surrounding areas. We offer in-person and virtual consultations.
Book a Confidential Consultation Today
Email info@cunninghamfamilylaw.com or send us a message. We respond within 4 hours on business days.
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