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Mr. Sean Griffin

Sean Griffin is the president of Cornerstone Services, Inc. (CRST), a Hudson Valley-based marketing and communications firm specializing in direct mail marketing, web development, and digital solutions. With a focus on creativity and data-driven strategies, Sean has established CRST as a leader in delivering measurable, cost-effective results for clients across industries.

Under Sean’s leadership, CRST creates bold and innovative direct mail campaigns that go beyond traditional designs. By utilizing advanced analytics and thinly-traded data, the company ensures maximum impact and engagement.

Through CRST Web Services, the firm offers SEO-friendly web design and development. These services include responsive, user-friendly websites equipped with analytics, e-commerce platforms, and CMS tools to help businesses expand their online presence.

With extensive experience in marketing, strategy, and project management, Sean leads a team of USPS-certified Project Managers and creative professionals who deliver high-quality, timely, and budget-conscious solutions.

Beyond CRST, Sean is dedicated to supporting local businesses in Hudson Valley, combining innovative ideas with practical strategies to address real-world challenges.

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