Founder and Chief Executive Officer
Lorraine Gregory Communications
Greg Demetriou is a respected business leader whose entrepreneurial vision and commitment to excellence have made a lasting impact on the Long Island business community. As founder and chief executive officer of Lorraine Gregory Communications, he built the company from a small print and mail shop into one of the region’s premier full-service marketing agencies, known for delivering strategic, creative and measurable solutions to organizations across various industries.
Over more than three decades, Demetriou has guided the agency’s growth through strategic acquisitions, expanded capabilities and a dedication to innovation. This has included the launch of LGC Studios, an award-winning, Emmy-nominated video production division, which has produced powerful storytelling projects, including a documentary highlighting the fight against Parkinson’s disease. Driven by a belief that business is ultimately about people, Demetriou is known for his collaborative, relationship-first approach and his ability to inspire those around him to aim higher and think bigger. He and his team have helped hundreds of businesses and nonprofits strengthen their brands, tell their stories and achieve meaningful results.
Beyond building a successful company, Demetriou is deeply committed to advancing Long Island’s economic vitality and giving back to the community he calls home. He has served on numerous boards, including the Long Island Community Foundation, Dolan Family Health Center, Printing Industries of America, Middle Market Alliance of Long Island, Moxxie Mentoring Foundation and Long Island Capital Alliance.
Through his leadership, mentorship and passion for progress, Demetriou continues to shape how organizations communicate, grow and succeed.