The legal team behind your next chapter.
Immigration, business law, white collar defense, and compliance From our Toronto and New York offices.
Trusted across every practice we take on.
Immigration, business, compliance, defense and notary work, in Ontario and New York.
Immigration
01Immigration and Mobility
Work visas, green cards and family petitions
Our practice focuses on securing work visas, managing compliance issues, and facilitating smooth relocation of talent across US and Canadian borders, including E2, L1, TN, H1B, O1, EB1, EB2, EB3, and family based immigration matters.
Services- TN Visa: TN visa lawyer for Canadian professionals taking a job in the US
- L-1 Visa: L-1 visa lawyer for transferring managers and specialists to a US office
- Investor visas
- E-2 Treaty Investor Visa
- EB-5 Investor Green Card
- E-1 Treaty Trader Visa
- Employment-based immigration
- L-1A and L-1B intra-company transfers
- H-1B specialty occupation visas
- TN visas (NAFTA/USMCA professionals)
- O-1 extraordinary ability visas
- E-3 Australian specialty occupation visas
- EB-1, EB-2, and EB-3 employment-based green cards
- Green card applications
- EB-1, EB-2, EB-3, and EB-5 green cards
- PERM labor certification
- National Interest Waiver (NIW)
- Family-based green cards
- Family-based immigration
- Spouse and fiancé(e) visas
- Parent and child petitions
- Sibling petitions
- Adjustment of status
- Consular processing
- Employer compliance and audits
- I-9 compliance
- Worksite audits
- Immigration compliance programs
- Employer sponsorship and LCA compliance
- Cross-border hiring strategy
02E-2 Visa Lawyer
Treaty investor visas for business owners
Mayo Law helps treaty country nationals, entrepreneurs, business owners, and essential employees secure E-2 visas to invest in and operate U.S. businesses.
- E-2 visa applications and consular processing
- New E-2 petitions
- DS-160 and DS-156E preparation
- Business plan drafting
- Source of funds documentation
- Consular interview prep
- E-2 change of status and extensions
- I-129 filings for applicants already in the U.S.
- E-2 visa renewals
- Extension of stay petitions for principal investors and dependents
- E-2 essential employee visas
- Petitions for executives
- Supervisors
- Specialized skill employees of E-2 treaty enterprises
- E-2 visa denials, RFEs, and refusals
- 221(g) administrative processing
- Responses to Requests for Evidence
- Refiling after denial
- Appeals strategy
- E-2 dependents and spouse work authorization
- E-2 derivative visas for spouses and unmarried children under 21
- E-2S spousal work authorization filings
- E-2 to green card pathways
- EB-5 transitions
- EB-1C multinational manager petitions
- EB-2 NIW evaluations
- Long-term immigration planning for E-2 investors building permanent ties in the U.S.
03Canadian Citizenship
Citizenship by descent under Bill C-3
Citizenship by descent under Bill C-3, lost Canadians, proof of citizenship, and how a Canadian claim sits alongside US status.
- Citizenship by descent
- Eligibility review for people born abroad to a Canadian parent
- Including second-generation claims under Bill C-3
- The documents that support them
- Lost Canadians
- Reviewing whether a citizenship was lost or never recognized
- The route to restore or confirm it
- Proof of citizenship
- Citizenship certificate applications
- Record searches
- Replacing or correcting documents
- Citizenship and US status
- How a Canadian claim sits alongside US citizenship
- A green card
- Or a visa — one file
- Both sides of the border
- Dual citizenship planning
- Keeping US citizenship while becoming Canadian
- The tax and travel questions that follow
Business
04Business and Corporate Law
Incorporation, startups, contracts and more
We work with you to help you minimize risks, optimize operations, and ensure your business thrives on the global stage.
Services- Business Lawyer in Toronto: For Ontario owner-managed and growing companies, from our Toronto office
- Incorporation: Incorporation lawyer for Canadian and US companies
- Startup Law: Startup lawyer for founders, from the first idea to scale
- Contract Law: Contract lawyer for drafting, review, audits and disputes
- Fractional General Counsel: Ongoing legal counsel for your company, without a full-time hire
- Business and corporate setup
- Business licenses
- Shareholder disputes
- Ongoing business compliance
- Mergers and acquisitions
- Cross-border disputes
- Intellectual property protection
- Corporate structuring and tax planning
05Compliance and Risk Management
Compliance audits, policies and risk plans
We help businesses across the United States and Canada navigate regulatory requirements, manage risk proactively, and build frameworks that support long-term growth and stability.
- Regulatory compliance audits
- Policy and procedure development
- Risk assessments and mitigation planning
- Cross-border compliance support
- Ongoing monitoring and advisory
- Regulatory and risk awareness training
Defense and notary
06White Collar Defense
Fraud, securities and investigations defense
Whether you're facing allegations of fraud, embezzlement, insider trading, or other financial crimes, we understand the intricacies and provide strong defense.
- Fraud and financial crimes defense
- Embezzlement and theft
- Insider trading and securities violations
- Money laundering and tax evasion
- Federal and state investigations
- Litigation and settlement negotiations
07Notary Public Services
Toronto and New York, remote where permitted
We provide reliable, professional notary services in both New York and Ontario for individuals, businesses, and legal professionals who need trusted document authentication.
- In-person and remote notarization (where permitted)
- Certified copies and affidavits
- Cross-border document notarization
- Apostille coordination
- Legal document witnessing and verification
Unlock international opportunities with expert legal guidance.
More about us- 01Hands-on legal guidance
Delivering practical, personal counsel in international business, immigration law, and white-collar defense.
- 02Personalized approach
We take the time to understand your goals and provide customized legal solutions tailored to your objectives.
- 03Long-term relationships
We build long-term relationships based on trust and transparency, working to develop our clients' interests in cross-border transactions.
Joseph Mayo
Principal Attorney
Joseph Mayo is the principal attorney at Mayo Law. He is licensed to practice law in both Ontario and New York, holds a Master of Laws (LL.M.) from New York University School of Law with a specialty in international business and a Bachelor of Arts (B.A.) in law and a Master of Arts (M.A.) in business from Netanya Academic College, and is a member of the American Bar Association and the Law Society of Ontario. His practice focuses on cross-border immigration, business law, white collar defense, and compliance.
Profile and articles
Roger Grekos
Law Clerk & Chief Operations Officer
Roger Grekos is the Law Clerk and Chief Operations Officer at Mayo Law, supporting the firm's practice across its Toronto and New York offices. Experienced in cross-border business and investor immigration matters, including E-2 and EB-5 files. He is also an entrepreneur and founder of technology startups with advisory experience, bringing an engineering and technology background to the operational side of a cross-border legal practice.
Profile and articles- Law Society of OntarioLicensed in Ontario
- New York State BarAdmitted in New York
What does an E-2 visa cost to qualify for?
There is no statutory minimum investment for the E-2 visa. What matters is that the investment is “substantial” relative to the cost of establishing or purchasing the type of business in question, and that the business is more than marginal. In practice, most successful E-2 cases involve investments in the range of USD $100,000 to $500,000+.
Read the E-2 service pageHow long does an E-2 visa take?
For consular processing, expect 8 to 16 weeks from the start of preparation (business plan, source of funds documentation, entity formation) through the consular interview. An E-2 change of status filed with USCIS typically takes 4 to 8 months under standard processing, or about 15 business days with premium processing.
Read the E-2 service pageCan a Canadian own a business in the US?
Yes. United States law sets no citizenship or residency test for holding shares in a US corporation or a membership interest in an LLC. Working in that business on US soil is a separate question, and it requires an immigration status such as E-2 or L-1.
Read the guide“Joseph explained every step of the legal process in a clear and straightforward manner. I always felt informed and at ease. His professionalism and dedication gave me confidence that my case was in the right hands. I highly recommend his services to anyone seeking legal assistance.”
Leena E.
“Working with Joseph Mayo was a fantastic experience. He is incredibly knowledgeable and efficient, helping me with important files that needed quick submission. His expertise and dedication were evident, and he guided me through the process in record time. I’m grateful for his prompt and thorough assistance. Highly recommended for anyone needing legal expertise!”
Ziad A.
“Joseph’s the kind of lawyer who actually listens. I never felt like just a file on his desk—he really took the time to understand me and what I was going through. It made the whole experience a lot less stressful. I’m honestly so glad I found him.”
Wisam R.
Legal Insights
What does Mayo Law do?
Mayo Law is a cross-border law firm with offices in Toronto and New York. We handle business and family immigration (including the E-2 treaty investor visa, L-1, H-1B, TN, EB-1, EB-2, EB-3, EB-5, and PERM), business and corporate law, international business, white collar defense, regulatory compliance, and notary public services in both Ontario and New York.
Where is Mayo Law located?
Mayo Law has two offices. The Toronto office is at 100 King Street West, Suite 5600, Toronto, ON M5X 1C9, reachable at +1 (647) 977-6980. The New York office is at 165 Broadway, Floor 23, New York, NY 10006, reachable at +1 (646) 889-1020. We serve clients across Ontario, the GTA, New York State, and globally for cross-border matters.
Is Mayo Law licensed in both Canada and the United States?
Yes. Mayo Law is one firm with offices in Toronto and New York. Its Ontario practice is licensed under the Law Society of Ontario and its New York practice under the New York State Bar, with the same team and the same standards on both sides of the border.
Who is Joseph Mayo?
Joseph Mayo is the principal attorney at Mayo Law. He is licensed to practice law in both Ontario and New York, holds a Master of Laws (LL.M.) from New York University School of Law with a specialty in international business and a Bachelor of Arts (B.A.) in law and a Master of Arts (M.A.) in business from Netanya Academic College, and is a member of the American Bar Association and the Law Society of Ontario. His practice focuses on cross-border immigration, business law, white collar defense, and compliance.
Does Mayo Law handle cross-border matters between Canada and the US?
Yes. Cross-border work is the core of our practice. We handle US work visas and investor visas for Canadians and treaty-country nationals, cross-border M&A and contracts, multi-jurisdictional compliance programs, and notary work that must be recognized in both countries. Because we are licensed and located in both Ontario and New York, coordination happens inside one firm rather than across multiple firms.
How do I schedule a consultation with Mayo Law?
The fastest path is to call our Toronto office at +1 (647) 977-6980 or our New York office at +1 (646) 889-1020, email info@mayo.law, or visit mayo.law/contact to schedule a consultation. Fill in the inquiry form and we will get back to you within 1 to 2 business days; if it is urgent, call us.
Does contacting Mayo Law create an attorney-client relationship?
No. Use of this website and initial contact with our firm does not create an attorney-client relationship. An attorney-client relationship is only formed once a written engagement agreement is signed by both parties. Please do not send confidential information through the website or by email until that relationship has been formally established.
Does Mayo Law work with individual clients or only businesses?
Both. Mayo Law works with individual clients on immigration matters (E-2 investor visas, family-based petitions, Canadian citizenship and Bill C-3 matters), notary services, and personal compliance or defense matters, as well as with businesses on incorporation, contracts, M&A, employment-based immigration, white-collar defense, and compliance programs. The firm advises both sides — a founder structuring a startup or a multinational entering Canada, and a family filing an immigration application.
One firm, two offices.
Toronto and New York, working internationally. Contact · info@mayo.law