Kathleen Guzman is a recognized appraiser and auctioneer with over thirty years experience in the art and antiques industry. Ms. Guzman is the Managing Director of Heritage Auctions in New York, the third largest auction house based in Dallas. She has personally auctioned over 1,500 sales with over $1 Million objects valued at over $1 Billion US dollars. She brings 15 years experience from the world-renown international auction house Christie’s, selling such items as a Monet watercolor for $4.3 Million and the Ruby Slippers from the Wizard of Oz for $660,000. She was the former President of Christie’s East and President of Phillips Auctioneers, as well as Senior Vice-President of Business Development at Ebay.

Ms. Guzman is frequently quoted in print, radio and has been seen on television regarding the art and antiques market and spokesperson for the art market on such shows as Oprah, Good Morning America, Today, CNN and Sally Jessy Raphael. She appears as an expert on the PBS series “Antiques Roadshow” for the past seventeen years, as on-air host for Good Life TV, host at QVC, and frequent guest for the Treasure channel satellite cable station in, “Treasure Seekers” and Metro TV’s “Antique Show and Sell”. She also has co-starred for the pilot TV show “For What It’s Worth” with Robin Leach and is a contributing editor to the Miller’s Antique Collector’s Books writing articles recently. She was the Director of Hubert Gallery, specializing in Henri Matisse and Pablo Picasso for two years, and is professionally, an independent consultant, a USPAP certified art appraiser, writer and charity auctioneer.

She holds an Executive M.B.A. from Columbia University and has a Master’s Degree in Art History from Queen’s College. Ms. Guzman lectures extensively on the art market for the American Appraiser’s Association, New York University, Bard College and the Fashion Institute of Technology. Ms. Guzman also auctions extensively for charitable causes including Make-a-Wish, Juvenile Diabetes and Housing Works to name a few, with noted celebrities. Her present and past clients include Bloomberg, Inc, the Estate of Marilyn Monroe, Barbra Streisand, the estate of Tom Thumb and the artist John Graham.

A graduate of University of Hawaii at Manoa, Ms. Burgum received her B.A. in Art History. After completing her degree, she attended Bowman Tech and Stewart's International, both for training in jewelry manufacturing and repair, then the Gemological Institute of America in Santa Monica, California, where she completed degrees in both Graduate Gemology and Jewelry Design in 1994.

Ms. Burgum began her working career as an on-call preview worker for Sotheby's Beverly Hills, California. She then moved to San Francisco as a jewelry cataloguer for Butterfield & Butterfield Auctions in 1996, transferring to their Los Angeles Jewelry department in 1997 as lead specialist, which she eventually left to build two jewelry web sites for start-up companies. She has also worked in retail jewelry sales and owned her own independent jewelry appraisal business.

She has been a contributor to Art + Auction, Brilliant, Eclat, Modern Jeweler, MSN Money, and Rapaport magazines.

Ms. Burgum has been a guest lecturer for the Los Angeles Natural History Museum, Gem & Mineral Council, and appeared as a specialist on HGTV, KTLA, CNN, FOX Business and ANTIQUES ROADSHOW.

Diane D'Amato is the Director of Luxury Accessories at Heritage. Diane made her name in the Luxury Accessories world following high profile positions working for Hermès of Paris and Louis Vuitton, where her buying trips to Paris were influential in setting market trends in the United States and she oversaw more than $12 million in annual sales. Her specialty is in creating exclusive marketing partnerships and forging loyal client relationships. Diane is based in New York, joining the talent-rich Heritage team stewarding the brand, where she assists consignors and collectors with appraisals as well as supervising the category's double digit growth.

Diane has used her talents to do extensive charitable fund raising,  including sales that have benefited FATE (Foundation for Autism Training & Education), Crohn's and Colitis Foundation of America and St. Jude Children’s Research Hospital.

With work in the retail, auction and manufacturing sectors of the jewelry industry since 1989, Gina D’Onofrio’s experience encompasses jewelry design and production, appraisals, buying and selling of contemporary, antique and period jewelry, sales and management.

Prior to joining Heritage, Gina operated an independent gemological laboratory, appraisal service and consulting firm and has been catering to private individuals, banks, trusts, non-profit organizations, insurance companies, legal firms and the jewelry trade in the greater Los Angeles area.

Gina received her Master Gemologist Appraiser® designation, upon completion of appraisal studies, written and practical examinations and peer appraisal report review with the American Society of Appraisers. In addition, she was awarded the Certified Master Appraiser designation with the National Association of Jewelry Appraisers. In 2013, Gina received Los Angeles Magazine's coveted “Best in LA” award for her Jewelry Appraisal Services.

She conducts presentations and speeches about appraisal and jewelry related topics to private and corporate groups in the Los Angeles area. Gina is currently serving as Gems and Jewelry Education Chair for the American Society of Appraisers and co-instructor for their Appraisal Report Writing For Insurance Coverage course.

Professional Affiliations 

• Fellow of the Gemmological Association of Great Britain (FGA)  

• Fellow of The Gemological Association of Australia (FGAA) 

• Certified Master Appraiser of the National Association of Jewelry Appraisers (NAJA)  

• Accredited Senior Gemologist, Accredited Gemologists Association (AGA) 

• Member of the National Association of Watch and Clock Collectors, (NAWCC) 

• Accredited Senior Member & Master Gemologist Appraiser®, (ASA)   

Keith Davis has worked within the timepiece industry for the entirety of his professional career, gaining valuable experience in nearly every aspect of the business. Prior to joining Heritage Auctions, he held executive and management positions at Richemont Group and LVMH. In his last role, Keith served as Commercial Director for Vacheron Constantin, overseeing the wholesale distribution for the brand in the U.S. and Canada. Prior to that position, he managed multiple regions for Bvlgari N.A., while also serving as the technical watch trainer for their retail and wholesale distribution.  

Keith’s introduction to the industry started in watchmaking and progressed to vintage restoration apprenticeships in England and the U.S. After several years of study, he worked in luxury watch retail and as a private appraiser and authenticator of vintage and antique wristwatches.

With years of experience working in the luxury accessories market before joining Heritage Auctions, Cristy DuRoss put a potential career as a lawyer on hold to pursue her interest in fashion and luxury. After graduation from Texas Tech, she moved to Dallas for a sales position at a Cole Haan boutique before assuming similar positions at Stanley Korshak and with Cynthia Denton. Cristy then was approached to manage an Anne Fontaine boutique before deciding to try the selling side of luxury retail with Hermès, where she eventually spent 17 years.  

Once with Hermès, Cristy was chosen to participate in an intensive training program in Paris, where she was able to witness the making of a Kelly and a Birkin bag at an atelier. Additionally, she was picked for two sessions of Podium for Hermès, during which she helped managers conduct their buys. Her constant focus is on always exceeding the expectations of a client who has ordered an exceptional handbag or piece of jewelry. Within her own collection, Cristy personally owns numerous Hermès bags, along with Chanel, Prada and YSL.  

The native Texan enjoys spending time with her husband Randy and 14-year-old son Aidan. In addition to involving herself in and supporting his school and activities, she promotes her love of animals by donating to Operation Kindness.

Lena Park joined Heritage Auctions in 2018 as a Luxury Specialist after eight years of being exposed to every facet of the secondary luxury experience, including merchandising/consignments, operations, e-commerce, customer experience and marketing.

A native of Orange County, California, Lena was introduced to the secondary luxury market as a product photographer and images editor for a vintage Chanel specialist, Boutique Patina, during high school. She moved on to Portero Luxury in New York, serving as head of operations and consignments while further studying how the luxury industry has grown.

After graduating from NYU with a BA in Biology and Minors in Spanish and Studio Art, Lena planned on going to dental school before ensconcing herself in her true calling. She enjoys helping clients curate their collections and seeing how they evolve along their collection journey.

Prior to joining Heritage Auctions, Ana Wroblaski has been involved in the jewelry business on various levels since 1999. Born in Chicago and raised in Los Angeles, she joined John Moran Auctioneers in Pasadena during 2011 to take charge of their growing jewelry department. Previously, Ana spent five years at Bonham’s and Butterfield’s Los Angeles, first starting as assistant to the senior specialist before she was promoted to a specialist, appraising and cataloging jewelry that ranged from antique to modern.

Once Ana got a taste of working with precious metals on her own, she served as an apprentice with a master jeweler in the Downtown Los Angeles Jewelry District. Focusing on minerals and gems, she then went on to fabricate and design jewelry for her own line and others as well. Ana is a Graduate Gemologist, earning her diploma from the Gemological Institute of America (GIA), an Accredited Jewelry Professional (AJP) and is constantly continuing her education by attending workshops and seminars to stay abreast of treatments, new mine discoveries and current style trends in the jewelry world.  

Ana has earned and stays current with the Uniform Standards of Professional Appraisal Practice (USPAP), and is currently working on the accreditation curriculum with the American Society of Appraisers (ASA).