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.

Sydney Steele, Event Planner
Sydney was just 7 when she planned her first event—a tea party. Years later she was wowed by a wedding she attended with her family. She’s never forgotten how the welcome basket in their hotel rooms matched the beautiful decor of the reception. And how everything just…flowed. 

Planning her own Quinceañera was great preparation for high school, where Sydney led a team that produced four themed dances. She began working at DiMadeline during college and now has a degree in communications from California State University, Fullerton. 

Even when she’s off the clock, Sydney pays careful attention to the decor, food, and vendors at events she attends. While weddings have long been her favorite type of event, she admits she would love to plan a music festival. 

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. 

Hannah Mellinger, Home Concierge

Hannah is a true mountain local! She was born at the quaint hospital in Lake Arrowhead,  grew up on the mountain, and married her high school sweetheart. She and her husband moved out of state but returned once they started a family. They wanted to raise their four children in the community they had always considered home.

As a child, Hannah was always rearranging her bedroom furniture and designing things. She couldn’t wait to help put spaces together. Currently, she and her husband run a successful construction and design firm. She is also a professional photographer. Her eye for design and organizational skills make her the perfect addition to our concierge team. 

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. 

Lake Arrowhead weekenders for a dozen years, and full-time residents for three, Steve and his husband have transformed their 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.