Plaza Companies' leadership is committed to building partnerships and relationships in the industries we serve, as well as in the communities where we do business.

Executive Leadership

Sharon Harper

Chairman & CEO

Sharon is Chairman, CEO and co-founder of Plaza Companies. Her forward-thinking commitment has helped make Plaza one of the premier real estate firms in Arizona and has earned her and Plaza respect throughout the industry and across the country. She is not only dedicated to her business endeavors, but is also actively involved in many different aspects of the community.

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Larry Pinalto



Larry oversees the accounting, financial reporting, and operations of the company. He is also involved in asset management, contract and construction review, debt structuring, equity funding, lease review and budget oversight, and is a Certified Public Accountant, licensed in AZ, CA and OR.

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Jon Stelzer

Senior Vice President


Jon joined Plaza in 2007, following two decades in project management and construction. His responsibilities include overseeing the companies’ construction of medical, office, healthcare and senior living facilities. He has an Architectural Engineering degree from Ohio State University.

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Kate Franklin

Director of Taxation, VP of Finance


Kate Franklin is a Certified Public Accountant and was previously Plaza’s trusted Tax Manager for Tull, Forsberg & Olson in Phoenix, Arizona where she has worked with them for the past thirteen years.

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Margaret Lloyd

Senior Vice President Brokerage Services


Margaret has more than 29 years of experience in the leasing, sales and development of commercial real estate in Arizona. At Plaza, she is involved in the leasing and sales of 1 million SF of medical office properties, and she also serves on the Healthcare Leadership Council for GPEC.

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Bill Cook

Senior Vice President Brokerage Services


Bill Cook is Senior Vice President of Brokerage Services at Plaza Companies. Bill has been with Plaza Companies since 2013, originally starting in the construction management department. Bill transitioned to the brokerage team in 2014 with a focus on leasing and investment sales of office properties.

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Mike McWilliams, Jr.

Associate, Brokerage Services


Mike McWilliams, Jr. is Associate of Brokerage Services with the Plaza Companies. He has spent more than 3 years in the commercial real estate industry in Arizona.

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Property Management

Peggy Maxwell

Senior Vice President Property and Facilities Management


As Plaza Companies’ Senior Vice President Property and Facilities Management, Peggy Maxwell oversees the company’s efforts with regard to third-party real estate and property management operations while serving as a hands-on senior property manager for new portfolios.

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Jeanette M.C. Socaciu, CPM, RPA, FMA

Senior Portfolio Manager


Jeanette is responsible for managing a portfolio of medical office buildings and Business Park & Office Condominium Associations. She brings to the company her expertise in tenant relations, lease administration, budgeting, accounting, vendor services and Association Board meetings.

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Scott Rubin

Senior Portfolio Manager


Scott oversees the Plaza Companies portfolio of properties that are developed, leased and managed in conjunction with industry partner USAA Real Estate Company. He has more than 10 years in the industry, the majority of which were focused in the office and medical real estate sectors.

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Melissa Annis

Senior Portfolio Manager


Melissa Annis is a dedicated Property Manager with 32 years of experience in retail and office properties. Throughout her career, she has managed over 4 million square feet of retail power centers, and numerous Class A Office Properties in central Phoenix including high rise office projects.

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Construction Management

Susan Byram, LEED AP

Vice President of Design and Construction


Susan joined the Plaza team with a decade of project management and construction experience. Her many responsibilities include all aspects of construction management for tenant improvements and development projects. She earned her Masters in Real Estate Development from ASU.

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Business Development

Tom Evans

ON Advertising


ON Advertising is the marketing and public relations provider for Plaza Companies. The company provides a full spectrum of communications, marketing, public relations, public affairs and business development services.