Our Staff

David Cordier

Founder and Owner
David Cordier is founder of Cordier Auctions & Appraisals. Mr. Cordier has been in the antiques business since 1980 and an appraiser since 1990. Mr. Cordier is a graduate of Winterthur Museum’s Winter Institute and has attended classes in the Fine and Decorative Arts at George Washington University, Washington, D.C., and the Appraisal Studies Program at New York University, New York. Mr. Cordier studied the Arts and Decorative Arts in Pennsylvania at Penn State University and holds a Master’s Degree in Business Administration from Penn State Capital Campus. Mr. Cordier has also worked in human services and health care and holds a Master’s degree in Human Services from Lincoln University, Oxford, Pennsylvania. Mr. Cordier has written extensively for the Harrisburg Patriot News reporting on antiques and related events in central Pennsylvania. He also wrote a bi-weekly feature column “Eye on Antiques” for the Sunday Patriot News from 2001 to 2006. David is a Leadership Harrisburg alumni and a senior member of the Harrisburg Kiwanis Club. He also volunteers at the Cumberland and Dauphin County Historical Societies and is a member of the HACC Auctioneering Advisory Committee. David is a Pennsylvania licensed auctioneer (#AU005321), a certified appraiser and an accredited auctioneer of real estate.

Ellen Miller

Director of Catalog and Specialty Auctions
Ellen Miller joined Cordier Auctions & Appraisals in 2001. Since then she has conducted research and documentation of inventory, maintained client relationships, and managed an international customer base. Ms. Miller earned a Bachelor’s degree in marketing from Shippensburg University and a Master’s degree in Business Administration from Temple University. Before joining Cordier Auctions and Appraisals, Ellen spent more than a decade working in the printing industry in sales and administration. Ellen is a collector of white ironstone and textiles. A volunteer with the Multiple Sclerosis Society, Ellen has served on the committee for the Women Against MS Luncheon, and has been a top fundraiser and team captain in the MS Walk for over 20 years. A life-long resident of Harrisburg, Ellen and her husband Steve share their West Hanover Township home with their two daughters. Ellen is a Pennsylvania licensed auctioneer (#AU005670) and a certified appraiser by the Certified Appraiser’s Guild of America. She began writing an appraisal column for Antiques and Auction News in 2014.

Erika Kelly

Director of Administration
After working part time as an administrator and bookkeeper for Cordier Auctions and Appraisals since 2003, Erika joined the staff full time in 2010. Erika earned a Bachelor’s of Science in Business Management from the Penn State Capital College and completed the HACC Auctioneering program in the Fall of 2013. Erika is a member of the Harrisburg Kiwanis Club and the HACC Auctioneering Advisory Committee. She has been a Certified Patient Partner Program volunteer with the Kidney Foundation of Central PA. She and her husband and their daughters reside in Camp Hill. When not working, Erika enjoys reading, cooking, and crafts. Erika is a Pennsylvania licensed auctioneer (#AU005881) and a certified appraiser by the Certified Appraisers Guild of America. She is also a Pennsylvania Notary and a Motor Vehicle Agent.

Melanie Hartman

Catalog Specialist, Antiques and Art
Melanie joined Cordier Auctions and Appraisals in 2011. Melanie earned a Bachelor’s of Science in Archaeology from Mercyhurst College and was an archaeological field tech before entering the 401(k) industry in 2000. Melanie and her husband James live in Palmyra with their son. A former USTA Middle States Team Captain, when Melanie is not playing tennis she can be found gardening or cooking. Melanie is a certified appraiser by the Certified Appraiser’s Guild of America.

Peter Seibert

Senior Cataloging Specialist
Peter received both his Bachelor of Humanities and his Master of Arts in American Studies from Pennsylvania State University. He received the Joel Sater Prize for Decorative Arts Scholarship and the Distinguished Alumni Award, both from Penn State. His professional career includes service at the Historical Societies of Dauphin and Cumberland Counties and Fort Hunter Museum in Harrisburg, Pennsylvania. He was President and CEO of The Heritage Center of Lancaster County, and is a past recipient of the City of Harrisburg Mayor’s Award for Distinguished Public Service. He is the former Executive Director of the Millicent Rogers Museum in Taos New Mexico where he curated exhibitions on Maria Martinez--the famed potter of San Ildefonso Pueblo and on Fred Harvey--the noted Western hotelier. Peter is the author of several books and many essays and articles primarily on Pennsylvania decorative arts. He has also lectured extensively on various topics including presentations at Winterthur Museum and the American Folk Art Museum in New York. He is a regular columnist of Antiques and Auction News. Peter currently resides in Williamsburg Virginia with his wife and children, where he continues his life-long obsession with collecting. Peter is a member of the Sons of Union Veterans, Sons of the Revolution and the Free and Accepted Masons.