Sullivan & Worcester is a law firm that operates within the niche field of Expat Tax Lawyers, a sector that demands a high level of specialization due to the intricate mesh of international tax laws and regulations. Catering to a global client base, the firm has carved out a reputation for merging legal acumen with technological prowess, which is a significant asset in today's ever-connected world.

The firm's approach to expatriate tax law is comprehensive, covering not just the immediate concerns but also long-term planning which is crucial for individuals and businesses navigating the complexities of international compliance. Sullivan & Worcester's expertise extends to estate and gift tax planning, a service that is particularly valuable for expatriates looking to manage their assets across borders. This foresight in estate planning can ensure smooth transitions and asset protection in the face of changing international laws, providing clients with peace of mind and financial stability.

One of the standout features of Sullivan & Worcester is their commitment to adopting modern technological solutions. In an age where legal practice is increasingly intertwined with digital innovation, the firm's emphasis on technology is a clear advantage. It enables them to address the needs of a 'globally-connected' clientele efficiently, which is a compelling selling point for businesses and individuals seeking legal services that are both cutting-edge and reliable.

While the firm does not explicitly mention its ranking within the industry, it's clear that Sullivan & Worcester positions itself amongst the top players in the field. Its focus on integrated services that span legal, tax, and accounting needs suggests a holistic approach that can be a significant draw for clients who prefer a one-stop solution to their complex tax situations.

For those facing the daunting prospect of an IRS audit or similar high-stakes situations, Sullivan & Worcester's experience in offering robust defense strategies is an attribute worth noting. Their expertise in offshore voluntary disclosure and international tax amnesty programs can act as a lifeline for those unintentionally entangled in the labyrinth of reporting requirements.

The firm's commitment to community involvement and diversity also resonates in today's corporate environment, where clients increasingly value social responsibility. This aspect of their practice may appeal to clients who seek to align with firms that reflect their principles.

Critically, while Sullivan & Worcester appears to offer a comprehensive suite of services, prospective clients might find the lack of explicit information on the firm's website about specific case studies or client testimonials a gap. Such information could provide additional assurance and insight into the firm's capabilities and successes.

In conclusion, Sullivan & Worcester stands out for its integrated approach to expatriate taxation, technological adeptness, and comprehensive service offerings. While the firm could benefit from more transparent client success stories, its strengths in providing detailed and technology-driven solutions in expatriate tax law position it as a notable contender for those seeking specialized legal representation in the complex arena of international tax law.