Our History

In 1957, George D. Zamias, one of the original shopping mall developers in the country, founded George D. Zamias Developer.  Since its inception, George D. Zamias Developer has developed over 30 million square feet of retail space, including more than 4.2 million square feet of joint venture developments.

In 1996, Zamias Services Inc was formed to service the portfolio of assets held by George D. Zamias Developer and to capitalize on third party leasing and management opportunities.

Today, Zamias is one of the largest privately held retail real estate companies in the country.



Our company would not be where it is today without the hard work, dedication, and generous spirit of Marianna and Sam Zamias. Though no longer with us, their positivity and graciousness resonate in all aspects of ZSI.

Marianna Zamias
Founder (1932-2016)
Samuel C. Zamias
Chairman (1956-2013)

Marianna joined her husband George D. Zamias in 1970 overseeing all the day to day activities at ZSI. She especially looked after all of the administrative assistants, who she considered family. She was a supporter of Mom's House and the Women's Help Center.

Marianna remained a vital part of the company until her passing in November 2016.

Sam began his career in commercial development in 1976. He participated in all aspects of the business from Construction, Leasing, Third Party Management, Acquisition and Development. He majored in Business Administration at St. Francis University and Arizona State University. Sam served as President and CEO of ZSI from 2001-2012, and remained on as Chairman until his passing in September of 2013.


Pappy D’s BBQ now at the Galleria Mall Johnstown

PRESS RELEASE: FOR IMMEDIATE RELEASE Pulled Pork, Brisket, Haluski and more rib-sticking BBQ now at the Johnstown Galleria   JOHNSTOWN, PA –The Johnstown Galleria is… MORE

Fine Wine & Good Spirits now open in Pitt Village

New PLCB store now open in the Village at Pittsburgh Mills.  MORE

Tractor Supply now open in College Plaza, Ebensburg, PA

Now open on Route 22 in College Plaza, Ebensburg, PA. MORE