Business Attorney in NYC: Mark J. Seelig, Esq.

Mark J. Seelig Introduce

In the fast-paced and complex world of New York business, having an experienced and pragmatic business attorney is a powerful asset. Whether you are navigating a commercial dispute, structuring a corporate transaction, or protecting your intellectual property, the right legal guidance can make the difference between success and a costly setback. Mark J. Seelig, Esq., offers a unique and comprehensive approach to business law, combining decades of legal expertise with a proven background as an entrepreneur and business leader. This blend of legal knowledge and real-world business acumen allows him to provide strategic advice that is not only legally sound but also practical and commercially viable. For New York businesses, from startups to established enterprises, his counsel is a valuable resource for addressing a wide array of legal challenges.

A business attorney's role extends far beyond the courtroom. It involves proactive planning, meticulous contract review, and strategic negotiation to help clients achieve their goals while minimizing risk. Mark J. Seelig has a distinguished career spanning over 30 years, during which he has personally handled and negotiated hundreds of deals and billions of dollars in transactions. His experience is not limited to one area of business law; it is a multi-faceted practice that includes corporate, litigation, real estate, and intellectual property matters. This broad expertise enables him to see the bigger picture and provide holistic legal strategies that consider all aspects of a business's operations. His "client first" philosophy ensures that every piece of advice is tailored to the specific needs and objectives of the client, making him a trusted partner in their success.

For New York City residents, the local legal landscape is particularly intricate. Regulations, court procedures, and industry standards can vary significantly. Working with a local attorney who is deeply embedded in the New York legal and business communities provides an invaluable advantage. Mark J. Seelig's practice is located in a central and easily accessible area, serving as a hub for clients from all over the metropolitan area who require top-tier legal counsel.

Mark J. Seelig's office is situated in a highly convenient and prestigious location at 125 Park Avenue, on the 7th floor, in New York, NY 10017. This address is directly across from Grand Central Terminal, one of the city's most significant transportation hubs. This prime location ensures exceptional accessibility for clients utilizing various forms of public transit, including the 4, 5, 6, 7, and S subway lines, as well as the Metro-North Railroad. The proximity to Grand Central Terminal makes it a straightforward journey for clients from Manhattan, the outer boroughs, Westchester, and Connecticut. This central positioning is a key benefit, allowing busy professionals to easily schedule and attend in-person meetings without the typical logistical challenges of navigating a large city.

The professional setting of the office provides a comfortable and confidential environment for legal consultations. The building is modern and well-maintained, offering a professional backdrop for discussing sensitive business matters. A restroom is available for client comfort. The accessibility of the office location reflects the firm’s commitment to providing a client-friendly experience from the very first interaction.

Services Offered

Commercial Litigation & Cross-Border Disputes: Representing clients in a wide range of business conflicts, including contract disputes, intra-corporate conflicts, bankruptcy litigation, and complex cross-border issues.
Corporate Law: Comprehensive counsel for businesses at every stage of their life cycle, from formation and mergers and acquisitions to private equity, venture capital, and joint ventures.
Intellectual Property: Providing legal services for patents, trademarks, copyrights, and trade secrets to help clients protect their valuable innovations and brand assets.
Real Estate Law: Assisting with commercial leasing, land use, zoning, and other real estate-related legal matters.
Employment Law: Advising on compensation and benefits, executive representation, and other employment-related legal issues.
Taxation & Estates: Offering counsel on taxation, estate planning, and matters for tax-exempt organizations.
Crisis Management: Providing strategic legal guidance to high-profile clients and businesses during critical, time-sensitive situations.
Criminal Defense & Government Investigations: Representing individuals and corporations in government investigations and white-collar criminal defense.
Matrimonial & Family Law: Providing legal services for family law matters, including disputes related to business interests.
Japan Practice/Law: Leveraging specific expertise and experience to assist clients with legal issues related to doing business in or with Japan.

Features and Highlights

Business-Minded Attorney: Mark J. Seelig possesses a rare blend of extensive legal experience and a deep understanding of business operations, having co-founded and chaired successful real estate private equity funds. This background allows him to provide practical, real-life legal advice that goes beyond a purely academic perspective.
Client-First Approach: Testimonials from clients consistently highlight his professionalism, precision, and genuine interest in their success. Clients feel heard and supported throughout the legal process.
Broad Range of Expertise: The firm offers an exceptionally wide array of practice areas, from commercial litigation to intellectual property and even specialized fields like Japan practice, providing a one-stop-shop for many business legal needs.
Strategic Location: The office’s central location at Grand Central Terminal offers unmatched accessibility, making it convenient for clients from all over the New York metropolitan area to schedule and attend appointments.

Contact Information

Address: 125 Park Ave 7th floor, New York, NY 10017, USAPhone: (212) 655-3555Mobile Phone: +1 212-655-3555

What is worth choosing

Choosing a business attorney in New York City is a significant decision that can have long-lasting consequences for your company. Mark J. Seelig’s practice stands out for its unique combination of legal excellence and hands-on business experience. His role as both a seasoned attorney and a successful entrepreneur means he approaches legal issues with a pragmatic and strategic mindset that is often missing in traditional legal firms. He doesn't just offer legal solutions; he provides business solutions that are grounded in a real-world understanding of finance, operations, and growth. This practical approach is invaluable for clients who need more than just legal theory—they need a partner who understands their bottom line.

The extensive list of services offered, from commercial litigation and corporate law to intellectual property and real estate, demonstrates a remarkable breadth of knowledge. This allows him to serve as a comprehensive legal resource, addressing a wide range of challenges that businesses face without the need to engage multiple law firms. For a small business owner or a corporate executive, this kind of consolidated, expert counsel is a major advantage. Furthermore, his long-standing and respected presence in the New York legal community, including his recognition by publications like Super Lawyers, speaks volumes about his professional reputation and the quality of his work.

In a city where business moves at the speed of light, having an attorney who is not only a brilliant legal mind but also a strategic business ally is a tremendous asset. Mark J. Seelig offers this rare combination, making him an excellent choice for any individual or company seeking to protect their interests, resolve disputes, and achieve their business objectives with confidence and clarity. His positive and energetic style, coupled with a proven track record of success, makes him a trusted advocate and a valuable partner in the New York business community.

Mark J. Seelig Services

Business attorney
Commercial Litigation
We represent businesses and individuals in complex commercial disputes, including contract, partnership, M&A, and securities litigation. Our litigators handle trials, appeals, and arbitration with strategic focus and proven results.
Corporate Law
MSF advises on entity formation, governance, M&A, private equity, and venture capital transactions. Our corporate attorneys provide practical, business-focused counsel to startups, growing companies, and established enterprises.
Criminal Defense & Government Investigations
We defend clients in white-collar and regulatory investigations, including SEC, DOJ, and IRS actions. Our experienced trial lawyers handle cases involving fraud, corruption, sanctions, money laundering, and cross-border enforcement matters.
Crisis Management
We help clients—especially high-profile individuals—navigate brand-threatening crises. Our attorneys manage legal, reputational, and strategic responses to public scrutiny, litigation, or controversy across business and personal matters.
Cross-Border Disputes
We represent clients in international litigation and arbitration, asset recovery, and multi-jurisdictional disputes. MSF attorneys offer deep experience in cross-border strategy and global legal networks to support complex commercial matters.
Employment Law
MSF counsels businesses on employment law compliance, contracts, workplace policies, and disputes. We also represent executives in negotiating compensation and severance agreements. Our team serves both U.S. and international clients.
Hotel & Hospitality Law
We advise owners, developers, operators, and investors on hotel and resort transactions, including acquisitions, financing, joint ventures, management, and franchise matters. Our integrated team supports every phase of hospitality operations.
Intellectual Property
Our IP team helps clients protect and commercialize patents, trademarks, copyrights, and trade secrets. We handle litigation, licensing, and global registrations across tech, media, life sciences, and more—maximizing value from IP assets.
Japan Practice/Law
MSF’s Japan Practice advises Japanese clients globally and U.S. clients with Japan interests. We provide cross-border counsel across litigation, M&A, employment, real estate, tax, trusts, and corporate law, tailored to business goals and cultural nuance.
Matrimonial & Family Law
We handle high-net-worth divorce, custody, and support matters with care and precision. Our attorneys focus on protecting clients’ interests and family dynamics while guiding them through complex legal, financial, and emotional challenges.
Mental Health Law
MSF represents individuals and families in matters involving hospitalization, guardianship, assisted outpatient treatment, and protective orders. We navigate the intersection of mental health and law with compassion, advocacy, and deep legal knowledge.
Privacy & Data Security
We help clients navigate evolving data privacy laws and security obligations. Our team advises across industries on compliance strategies involving AI, cloud, Web3, and emerging tech, with practical guidance on risk, governance, and regulatory matters.
Real Estate Law
MSF advises investors, developers, lenders, landlords, and tenants on complex real estate transactions. We structure deals across asset classes and jurisdictions, integrating tax, corporate, and litigation expertise for effective, creative legal solutions.
Taxation & Estates
We provide strategic tax planning, transactional structuring, and estate counsel for individuals and businesses. Our attorneys offer practical guidance on tax-efficient operations, compliance, controversy resolution, and intergenerational wealth transfers.
Financial Services Litigation
MSF represents banks, funds, and financial institutions in litigation, arbitration, and pre-suit risk management. Our attorneys advise on credit practices, investment disputes, and regulatory issues with deep financial industry knowledge.
Intra-Corporate Disputes
We handle disputes between business partners in LLCs, partnerships, and corporations. Our team litigates corporate divorces, dissolution actions, fiduciary duty claims, and minority shareholder oppression matters.
Bankruptcy Litigation
MSF represents creditors, purchasers, and defendants in complex bankruptcy matters including lift-stay motions, Section 363 sales, adversary proceedings, and plan confirmation disputes across industries.
Mergers and Acquisitions
Our attorneys advise clients on mergers, stock and asset sales, recapitalizations, and other transactions. We handle both buy- and sell-side deals for private businesses, middle market companies, and investment firms.
Private Equity and Venture Capital
MSF advises investors, portfolio companies, and startups on equity and debt financing, investment structuring, and term negotiation. We support PE/VC transactions with tax, IP, and corporate counsel.
Joint Ventures
We structure and negotiate corporate joint ventures and complex contractual alliances, helping clients balance legal protection with business flexibility across sectors and deal types.
Compensation and Benefits
We assist employers with designing and implementing executive compensation, equity plans, and long-term incentives, ensuring legal compliance and strategic alignment with business goals.
Executive Representation
MSF represents executives in negotiating compensation, equity, benefits, and severance agreements. We focus on maximizing value while protecting our clients from unfair obligations.
Patents
Our patent attorneys are engineers and technologists who help clients secure and protect IP across high-tech industries. We manage prosecution, litigation, post-grant proceedings, and portfolio strategy.
Trademarks
MSF manages global trademark portfolios, helping clients clear, register, license, and enforce brand rights. We support startups and established businesses with protection across all industries.
Copyrights
We assist clients with copyright registration, protection, licensing, and enforcement across industries. Our team handles due diligence, compliance protocols, and IP structuring for tech, media, arts, and cultural organizations in the U.S. and abroad.
Trade Secrets
We help businesses safeguard trade secrets and know-how through strategic contracts, clean-room protocols, and litigation. Our team provides practical guidance on deploying proprietary knowledge without compromising legal protection.
Tax-Exempt Organizations
MSF advises on nonprofit formation, IRS exemption applications, private letter rulings, and complex hybrid structures. We also guide governance, conflict-of-interest matters, and compliance for foundations, trusts, and public charities.
Estate Planning
Our attorneys provide tailored estate plans for individuals, families, and business owners. We advise on wealth transfers, charitable trusts, family dynamics, and tax-efficient strategies to preserve assets for future generations.
Land Use and Zoning
We help clients navigate NYC’s zoning and land use approvals, including CPC, BSA, and LPC proceedings. Our attorneys advise on development rights, city agency interactions, and land use strategy across all five boroughs.
Commercial Leasing
MSF represents landlords and tenants in retail, office, industrial, and ground lease negotiations. We handle build-to-suit deals, subleases, and disputes, drawing on deep experience across NYC’s commercial property landscape.