Business Details
Your Trusted Legal Partner in Massachusetts & New Hampshire
Shaheen Guerrera O Leary (SGO) is a full-service law firm with over 100 years of combined legal experience across Massachusetts and New Hampshire. Our team of seasoned attorneys specializes in diverse practice areas, including business law, family law, estate planning, real estate, and civil rights, providing tailored solutions to meet clients' evolving needs. Rooted in the Merrimack Valley community, we prioritize accessibility, personal investment, and a deep understanding of local legal landscapes.Our approach combines legal expertise with real-world insights as community leaders, business owners, and property holders to deliver strategic, client-focused outcomes. We are committed to building long-term partnerships, ensuring clients receive precise counsel when they need it most, while maintaining a reputation for integrity, professionalism, and compassionate advocacy.
Services
Business Law
Family Law
Mediation
Collaborative Law
Construction Law
Real Estate
Commercial Litigation
Estate Planning
Personal Injury
Civil Rights Law
Highlights and features
- We offer over 100 years of combined legal experience across diverse practice areas.
- Our attorneys maintain deep ties to the Merrimack Valley community and courts.
- We provide personalized counsel combining legal expertise with real-world business insights.
- Our track record includes successful outcomes in complex litigation and transactional matters.
- Client testimonials highlight our compassionate, detail-oriented, and strategic approach.
What people say
Compassionate approach
Exceptional mediation services
Strategic divorce attorney
Transparent communication
Cost-effective resolutions
Services
Family Law
SGO provides comprehensive family law services including divorce proceedings, child custody arrangements, and child support negotiations. Our attorneys combine legal expertise with compassionate guidance to help clients navigate emotionally challenging situations. We specialize in both traditional litigation and alternative dispute resolution methods like mediation, ensuring clients receive strategic counsel tailored to their specific family dynamics and long-term needs.
Estate Planning
Our estate planning practice creates customized solutions for asset protection, including wills, trusts, and power of attorney documents. We help clients minimize probate costs while ensuring their wishes are honored. The team provides strategic guidance on tax implications and succession planning, working closely with families to create seamless transitions of wealth and responsibilities across generations.
Business Law
SGO offers full-service business law representation covering contracts, mergers and acquisitions, corporate restructuring, and employment law matters. Our attorneys advise businesses on governance issues, compliance requirements, and dispute resolution strategies. We provide practical legal solutions that align with commercial objectives while protecting clients' interests in both transactional and litigation contexts.
Personal Injury
Our personal injury practice represents clients seeking compensation for injuries caused by negligence. We handle automobile collisions, slip and fall incidents, and workplace accidents, negotiating with insurance companies to secure fair settlements. When necessary, we aggressively pursue litigation to recover medical expenses, lost wages, and pain and suffering damages on behalf of our clients.
Mediation Services
SGO's trained mediators facilitate constructive negotiations for family law matters, business disputes, and civil conflicts. We promote cost-effective resolutions while maintaining client control over outcomes. Our mediators use collaborative techniques to help parties reach mutually satisfactory agreements, reducing the emotional and financial costs associated with traditional litigation processes.
People
Peter G. Shaheen
Partner
With over 30 years of experience, Peter Shaheen provides practical legal solutions for business owners and families. His expertise spans corporate law, estate planning, and real estate transactions. Clients praise his business acumen and ability to translate complex legal concepts into actionable strategies that protect both personal and professional interests.
Sean P. OLeary
Partner
Sean OLeary specializes in family law and mediation, known for compassionate representation in divorce proceedings and child custody matters. Clients consistently highlight his thoroughness, cultural competency, and ability to navigate complex emotional situations while achieving favorable legal outcomes through both negotiation and litigation.
Nicholas S. Guerrera
Partner
Nicholas Guerrera brings extensive courtroom experience to commercial litigation and civil rights cases. His practice focuses on protecting client interests in complex legal disputes, combining aggressive advocacy with strategic problem-solving to resolve business conflicts and defend individual rights in state and federal jurisdictions.
Carol A. OLeary
Associate Attorney
Carol OLeary supports clients in family law matters and estate planning, leveraging her legal expertise and community connections. With admissions to multiple state bars, she provides detailed legal analysis while maintaining a client-centered approach to sensitive personal matters.
Questions
What areas of law does SGO specialize in?
SGO provides comprehensive legal services in business law, family law, estate planning, real estate, civil rights, personal injury, and commercial litigation.
How experienced is the SGO legal team?
Our attorneys have over 100 years of combined experience representing clients in Massachusetts, New Hampshire, and federal courts.
Does SGO offer alternative dispute resolution options?
Yes, we specialize in mediation and collaborative law to help clients resolve disputes efficiently outside traditional courtroom litigation.
How does SGO approach client relationships?
We prioritize personalized service, combining legal expertise with community knowledge to create tailored solutions for each client's unique needs.
What sets SGO apart from other law firms?
Our attorneys combine decades of legal experience with business ownership perspectives and a commitment to maintaining long-term client partnerships.
