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Meet your party people


Small enough to offer personal service, yet big enough to handle any size event, DiMadeline & Company has a core team plus an “extended family” of trusted vendors and venues. 

Event planner Diana Phillippi

Diana Phillippi, Senior Event Designer
Diana’s event planning started in childhood.  She was known in her Altadena, California neighborhood for her love of organizing parties.  As she got older, she chaired or co-chaired many events in high school and college. (Not surprisingly, her membership in the Kappa Alpha Theta sorority offered many opportunities to plan events.)

She began to build her reputation and portfolio at an event planning firm in Memphis. As one of the co-founders, she built her skills by staging marathons, coordinating elaborate weddings, and even providing behind-the-scenes movie production assistance. She provided the same level of client service to smaller events as well, such as intimate gatherings for twelve.

Diana relocated to Southern California in 2014 and dazzled clients with her creative ideas, out-of-the-box approach to problem solving, and attention to every deadline and detail. Her event planning skills are put to perfect use in the homes of weekend residents of Lake Arrowhead. She and her team consider your arrival to your vacation home a very special event.

Mandy Bates

Mandy Bates, Wedding Coordinator
Mandy gained valuable event planning experience during her 18 years as a high school teacher. She's coordinated many fundraisers, sports events, fashion shows, and proms.

Along the way, her friends enlisted her help for their weddings and, later, their children's weddings. Her energy, creativity, and expertise make her the perfect fit for DiMadeline & Company. 


Betsy Allen, Home Concierge

Betsy and her family moved to Lake Arrowhead in 2004 because they wanted to raise their children in a smaller, safer, friendlier community. The scenic beauty and snow sports sealed the deal! 

She has spent more than 20 years in design with a focus on holiday decorating with Christmas trees, wreaths and garlands. In 2014 she launched her own business that creates floral arrangements for weddings and events. Weekenders have a hard time keeping houseplants alive, so fresh flowers are the perfect way to bring the outdoors inside.


Steve Valentine, Home Concierge
Steve’s long career in public relations includes deep dives into the fields of hospitality, entertainment, health/wellness, and event production. All these come into play in his work with DiMadeline & Company.

He continues to operate his PR firm remotely while taking the time to enter (and often win) ballroom dance competitions, and volunteer for the Lake Arrowhead Communities Chamber of Commerce. 

Steve and his husband have transformed their Lake Arrowhead home into a Mountain Modern masterpiece. Along the way he has gained a reputation as a host and tastemaker. His knowledge of local purveyors, resources, and events is an asset to any resident or vacation homeowner.

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