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Our Staff


Back row: Wayne Cozza, Andrea Wagner, Terrianne Trollope, Joe Willis
Front Row: Lilly Soto, Alison Cripe, Rose O’Shaughnessy, Clein Malicdem

Key Management Co., Inc. was formed by Ralph McMillen and George Siddons October 1, 1981.

Ralph “Mac” McMillen (1931-2011), our first President and Corporate Broker, retired from property management in June, 1998.
George Siddons, CPM, CRB, & GRI, obtained a Real Estate License in 1972 in the State of Pennsylvania. After moving to Arizona in 1976,he continued in property management and obtained a Brokers License in 1987. George has been awarded the professional real estate designations of Certified Property Manager (CPM), Certified Real Estate Brokerage Manager (CRB) and Graduate of the Real Estate Institute(GRI). He is a member of the National Association of Realtors, Institute of Real Estate Management, West Maricopa County Regional Association of Realtors and the Arizona Association of Realtors.
Alison L. Cripe ,Corporate Broker, obtained her Real Estate License May of 2006 and Associate Brokers License December of 2016. She started with Key Management in August 2005 in an entry level position and has studied and learned the property management business from within our organization. Alison, formerly from Pennsylvania came to us from the Pike County Sheriff’s Department where she handled foreclosure sales, evictions, warrants and many other duties. Alison is a member of theNational Association of Realtors, West Maricopa County Regional Association of Realtors and the Arizona Association of Realtors.
Wayne Cozza came to Arizona from Chicago in 1972. He joined the Key Management staff in 1994. For the immediate 8 years prior, he worked with a few Texas banks inspecting, rekeying, cleaning up and maintaining the yards of their foreclosures. Due to his extensive knowledge Wayne handles some property inspections for new accounts, the move in inspections with the tenant, assigning of work to if necessary make the properties rent ready. He handles the security deposit dispositions monitoring the charges and research needed in the event of disputes.
Andrea Wagner considers herself a native Arizonian since moving from Ohio to Arizona in 1978. After graduating high school she worked in the restaurant service industry. She met Mac & George in 2001 and in February 2005 she joined the Key Management staff. Andrea’s duties include all accounts receivable entries, scanning & depositing funds in Trust Accounts and renewal of management agreements.
Clein Malicdem moved with his parents from Chicago in 1986. Prior to joining the Key Management staff in 2004 he had a background in retail, security and banking. As bookkeeper, Clein’s duties are handling the accounts payable department. All vendor payment, monthly rental tax and owner surplus is handled through his department. Clein is a graduate of Arizona State University.
Joe Willis arrived from Pennsylvania in July 2005 with his wife and family. Since working in the H.V.A.C & plumbing industry in New York for 20 years he continued his employment in that field. He started part-time work at Key Management in October 2005 driving by and inspecting vacant properties. Full time work began September 2007. Joe’s duties include property inspections, focusing mainly on interior inspections prior to renewal of any leases.
Lilly Soto relocated from New York to Arizona in 2001. Prior work experience includes sales, marketing, banking, hospitality and apartment leasing. Lilly joined the Key Management staff September 2005. Her duties are processing of rental applications, preparation of rental agreements and communicating with both clients & customers. Lilly is fluent in Spanish.
Terrianne Trollope (Teri) moved to Arizona from Southern California in 1994. She came to us from the food service industry and has worked as an executive secretary for a large real estate office. Her duties are preparing the rental listings for our website, sending notices to tenants for Homeowner Association and City violations and sending information to our clients and customers via the internet and mail.
Rose O’Shaughnessy joined our staff September 2018. Originally from Brooklyn, NY, moved to Florida where she was licensed in real estate in 2001. In 2008 she and her family moved on to Minnesota for 10 years. Desiring warmer weather she and her husband relocated to Arizona. Rose recently obtained her real estate license in Arizona and in January 2019 will become a member of the National Association of Realtors, West Maricopa County Regional Association of Realtors and the Arizona Association of Realtors.

A Chance Parking Lot Meeting

Mac & George, who had known each other since 1979, were now working at the same real estate company in 1981. Mac was recently hired to try and straighten out the property management department. George had been there for two years in sales and working with the owner on budgets.

Both usually arrived early at the office. One early July morning Mac and George were in the parking lot early when Mac commented that the only way to straighten out the property management department was for the two of them to purchase it. His next comment was “George, you figure out how to do it.”

Mac was born & raised in Phoenix, was retired from law enforcement after working with the Phoenix Police Department and the Maricopa County Sheriff. A Certified Property Manager previously managing apartment complexes knew well the market needed single family property management.

George a native of Pennsylvania moved to the Phoenix area in 1976 then settled in Glendale. Licensed in 1972 working in a resort area, he worked in sales and resort style property management of single family homes.
With George’s bookkeeping background, being a numbers person & Mac’s knowledge of the local market, Mac believed they would make perfect partners.

October 1, 1981 Key Management was born. Mac & George stayed partners for 17 years until Mac’s retirement. Although the original plan was to build the company for 5 years and then sell, we are still running after more than 35 years.