The Gialamas Company’s fully integrated in-house staff and maintenance team, combined with our distinct knowledge and experience, ensures the highest level of service in all facets of the company.
Commercial Real Estate Services
Development
The Gialamas Company has been involved with land development in Wisconsin since 1976. Our buildings are built from the ground up and leased and managed internally from inception. We focus on long-term master planning and master building, while tending to every detail.
Brokerage
The Gialamas Company real estate agents represent a broad spectrum of clients in the community from landlords and tenants to buyers and sellers who are looking to acquire or lease commercial property. Regardless of what your business needs are, we have the knowledge and experience to create the right space for you.
Management
The Gialamas Company property management team consists of knowledgeable and hard-working professionals with a vast array of skills and experience. We fully understand the importance of providing the highest level of customer service to both our tenants and clients, and make it our number one priority.
Our People
Aris Gialamas
President
Aris Gialamas is a licensed Real Estate Broker and President of Sales for The Gialamas Company. He specializes in commercial real estate sales, leasing and development.
Aris has evolved with The Gialamas Company from the ground up since the age of 14.
Andy Van Haren
Vice President of Construction and Facility Management
Andy Van Haren has been with The Gialamas Company since 1995 and is responsible for monitoring the schedule, performance, and cost of all development projects.
Andy also manages the in-house maintenance staff team, who together maintain over 1,000,000 square feet of office space. Andy draws from more than 40 years of experience in both facilities and construction fields to manage his team and achieve The Gialamas Company’s goal of providing the best service available.
Cathy O’Donnell
Vice President of Operations
Cathy O’Donnell joined The Gialamas Company as Vice President of Operations in 2007. She is responsible for the day-to-day management of Business Operations, including Tenant Relations, Marketing, IT, Sales Support, and Project Management.
Cathy brings a diverse group of talents to the company and has a strong sense of community.
Magdalena Jaworska
Controller
Magdalena Jaworska joined The Gialamas Company in July 2025 and serves as Controller, overseeing the company’s accounting and financial reporting for its commercial real estate portfolio.
She brings extensive experience in real estate accounting, budgeting, financial analysis, tax planning and financing.
Her background spans public accounting, private industry, and consulting, including serving as a manager at a public accounting firm where she specialized in real estate clients.
Award Winning Group
