Diana O'Rourke Producer

Diana has been a member of The Hettema Group team since 2008, providing project support from concept through installation. Her tenure at THG has allowed Diana to participate in projects such as the Thea award-winning “Beyond All Boundaries”, Dragons Wild Shooting interactive dark ride at Lotte World, and the World Expo 2012 USA Pavilion in Yeosu, Korea.

With a background in theater and dance (both on stage and behind the scenes), Diana’s work in the themed entertainment industry has afforded her the opportunity to continue to flex both her creative and managerial muscles in a fun, challenging and exciting environment.


B.S., Ithaca College


Beyond All Boundaries, The National World War II Museum, New Orleans, LA

ExplorOcean Preview Center, Newport Beach, CA

High Roller at The Linq, Las Vegas, NV

USA Pavilion, 2012 World Expo, Yeosu, Korea

Dragons Wild Shooting, Lotte World, Seoul Korea

George Mandella Interactive Producer

George comes from the world of immersive experiences in technology and the arts.  He served as CTO of Zoomedia, an internet communications company for the world’s largest life sciences companies.  At Zoomedia, George oversaw the company’s strategic, consulting, engineering IT, project management, and R & D. He directed product development and was responsible for the deployment of new technologies.

George founded and was CFO/COO for Black Letter Discovery, a professional services company. Under his leadership, the company consistently increased profitability and expanded from a single office to a national operation.

George leveraged his multi-disciplinary background to produce unique, mind-expanding experiences.


B.A., University of Southern California School of Cinema-Television

Creative writing, New York University

Charles University, Prague, Czech Republic

Jared Peter Project Manager

Jared comes to The Hettema Group after serving as the Production Manager at the Dolby Theater in Hollywood. While at the Dolby, Jared worked on the integration of complex productions such as The Oscars, AFI Fest, AFI Honors and a wide range of events including major movie premieres and theatrical productions. Previously, he worked as a Producer on the schematic and detail design phases of Bollywood Park in Dubai; which opened in November 2016. In the 8 years prior, he worked exclusively with Cirque du Soleil on the production and creation phases of three major productions: The Beatles LOVE in Las Vegas; ZAiA in Macau, China and IRIS in Los Angeles.


The Beatles LOVE in Las Vegas

The 87th and 88th Academy Awards

 Bollywood Park in Dubai

Jodi Roberdes Director of Facility Design Services

Jodi has played an integral role in many architectural and interior design projects for The Hettema Group since 2009, including Dragons Wild Shooting at Lotte World, the Malaysia Truly Asia Centre, The High Roller observation wheel in Las Vegas, DreamWorks Water Park, Meadowlands and was Lead Architectural Designer for the One World Observatory experience at the World Trade Center in New York City. She is currently in charge of the architectural design for a major theme park in Asia.

Jodi was Director of Design at Scenery West Design & Construction, creating turnkey projects involving multiple disciplines, specialty consultants, architectural facility interface and show integration. She was responsible for projects including Sony’s ‘Where the Wild Things Are’ attraction, Japan; Sea World’s Circ de la Mer Attraction, San Diego; Fort Worth Zoo, Texas Wild! 8-acre expansion; five GameWorks Entertainment Centers throughout the U.S., and Oakley Flagship Stores.  As Senior Associate at JKI International Architectural & Planning, Jodi executed multiple design/build projects domestically as well as interior entertainment facilities and attractions internationally. Jodi was consultant to Walt Disney Imagineering, assisting with exteriors and interiors for Disney’s California Adventure.


B.A., Architecture, California State Polytechnic University, Pomona

M.A.,Urban Design and Planning Technical University, Athens, Greece


One World Observatory at One World Trade Center, New York City

High Roller Observation Wheel, Las Vegas

Kelley Ritch Senior Producer

Having worked on numerous show sets both domestically and internationally, Kelley is a Producer/Project Manager specializing in creative based projects with over 15 years of experience. Before transitioning into themed entertainment, Kelley’s career began in the film/television industry which ingrained in her the driving force of production schedules and the ability to achieve success within budget limitations. Kelley has held key roles in some major entertainment projects and the diverse project exposure makes her uniquely qualified to run multifaceted projects and guarantees any project she takes on will be realized beyond all expectations.


Universal Studios Orlando, Harry Potter Escape from Gringotts, Queue scenic show set

Universal Studios Orlando, Optimus Prime Marque Figure, Transformers Attraction

Cirque du Soleil, Michael Jackson THE IMMORTAL World Tour, Scenic Show Set

Taylor Swift 2011, “Speak Now” Concert Tour, Scenic Show Set

Katy Perry 2011, “California Dreams” Concert Tour, Scenic Show Set

Universal Studios Singapore, Resorts World/Sentosa, Lights, Camera, Action , Special Effects Theater/Show Set

WDI/Disneyland Resort, Finding Nemo, Scenic show set

Melissa Schulman Senior Producer

Melissa Schulman’s 15 years of experience in the themed entertainment industry has given her an opportunity to work on a diverse range of projects including theme park attractions, museums, and visitor centers. Her strengths include budget, schedule, and scope management for companies such as BRC Imagination Arts and The Pastilla Institute of Design. Melissa has been at The Hettema Group for over 3 years working on a variety of projects.

She is also the founder of Yoga-urt, an organic frozen yogurt store in Glendale, CA, which was sparked by her passion for yoga.


B.A., Cal State University, Northridge


Louisiana’s Old State Capitol Visitor Experience

Arizona Science Center

Heineken Experience

Shuttle Launch Experience

Microsoft “Surface” Campaign

Nina Tchaghayan Architectural Production Manager

With close to 15 years of varying experience in the design and construction industries, Nina has been the Project and Design Manager for a variety of project types which include:  Theme Parks, Museums, Institutional, Historic Rehabilitation and Preservation, Custom/High end Residential, Mixed-Use, Tenant Improvements and more.

With a Bachelor of Architecture and special interests ranging from experiential design to historic preservation, Nina has extensive experience in all stages of projects; from conducting research, designing and coordinating with various consultants to leading teams, preparing presentations and cost estimates, and observing construction.  

As Design Manager, Nina managed a team of 15-20 show set designers for Bollywood Parks and Motiongate theme parks in Dubai.  She was also Lead Technical Designer for the Nature Lab exhibit at the Natural History Museum of Los Angeles, as well as, for Super Silly Fun Land for Universal Studios in Hollywood, which included the overseeing of fabrication.       


Bachelor of Architecture, Woodbury University


Union Station 360, Los Angeles

Bollywood Parks, Dubai

Motiongate, Dubai

Nature Lab Exhibit, Natural History Museum, Los Angeles

Super Silly Fun Land, Universal Studios, Hollywood


Los Angeles Conservancy 2010 Preservation Design Award for The Hollywood Bungalow Courts

California Preservation Foundation 2010 Design Award for The Hollywood Bungalow Courts

California Preservation Foundation 2013 Design Award for Orchard Gables Rehabilitation

Featured in “Here Tomorrow: Preserving Architecture, Culture, and California’s Golden Dream” by J.K. Dineen for The Hollywood Bungalow Courts

Sunnie Burke Executive Architect

Sunnie is a licensed architect who has worked on a wide variety of building projects, including residential, commercial, and institutional facilities. For over 15 years, Sunnie has created comprehensive design packages for themed entertainment projects. Her production management skills have been a key factor for many projects staying on schedule and within budget.


B.S., School of Architecture, Georgia Institute of Technology

M.A., Architecture, Southern California Institute of Architecture


Disneyland Resort

Universal Studios: Singapore, Japan, Hollywood

Warner Bros:  The Making of Harry Potter, England

Valerie Williams Producer

Valerie worked at the Walt Disney Company, where she began at Corporate Operations, Planning and Finance at the Studio. She then transferred to Walt Disney Imagineering, where she started her career that spanned over 25 years.  At WDI, she worked with the Tokyo Disney Resort portfolio in multiple capacities that included coordination, liaison between WDI and Oriental Land Company for maintenance and Show Quality Standards, Production Management, Producing and Project Management.   Projects ranged from small and large enhancements to high-end hotel character rooms, large-scale attraction renovation, and design of a new addition to the Tokyo Disneyland Fantasyland and Tomorrowland.


Cinderella’s Fairy Tale Hall

Tokyo Disneyland Star Tours Renovation

Tokyo Disneyland Hotel and Hotel Mira Costa Character Rooms

Stitch Encounter

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