The ExOne Company Announces Appointment of JoEllen Lyons Dillon as Chief Legal Officer and Corporate Secretary

The ExOne Company Announces Appointment of JoEllen Lyons Dillon as Chief Legal
Officer and Corporate Secretary

NORTH HUNTINGDON, Pa., March 11, 2013 (GLOBE NEWSWIRE) -- The ExOne Company
(Nasdaq:XONE), a global provider of three-dimensional ("3D") printing machines
and printed products to industrial customers, announced today that it has
appointed JoEllen Lyons Dillon to a newly created position as its Chief Legal
Officer and Corporate Secretary. As Chief Legal Officer, Ms. Dillon will be
responsible for overseeing all of ExOne's global legal matters. Ms. Dillon
will also serve as ExOne's Corporate Secretary to the Board of Directors and
will be an executive officer of the Company.

Ms. Dillon has 25 years of experience counseling public and private companies,
which most recently included assisting ExOne's senior management in
successfully completing the Company's initial public offering in February
2013. Ms. Dillon also has extensive experience in representing senior
management teams and boards of directors. She has previously worked at two
national law firms, Reed Smith LLP from 2002 until 2011 as a partner and
Buchanan Ingersoll & Rooney PC from 1988 until 2002, where she became a
partner after starting as an associate with the firm.

ExOne CEO Kent Rockwell stated, "We are extremely pleased to have JoEllen join
our executive team. During our initial public offering we recognized that she
has the experience and leadership skills to assist our Board and management
team as we pursue our strategic objectives."

Ms. Dillon was the former Chair and currently serves as the Audit Committee
Chair of the Allegheny District chapter of the National Multiple Sclerosis
Society. She is also a Vice President of the Wine & Spirits Advisory Council
to the Pennsylvania Liquor Control Board.

About ExOne

ExOne is a global provider of 3D printing machines and printed products to
industrial customers. ExOne's business primarily consists of manufacturing and
selling 3D printing machines and printing products to specification for its
customers using its in‐house 3D printing machines. ExOne offers
pre‐production collaboration and prints products through Production Service
Centers, which are located in the United States, Germany and Japan. ExOne
builds 3D printing machines at its facilities in the United States and
Germany. ExOne also supplies the associated products, including consumables
and replacement parts, and services, including training and technical support,
necessary for purchasers of its machines to print products.

The ExOne Company logo is available at
http://www.globenewswire.com/newsroom/prs/?pkgid=17033

CONTACT: Media:
         Nicole McEwen
         Marketing Director
         (724) 765-1328
         nicole.mcewen@exone.com
        
         Investors:
         John Irvin
         Chief Financial Officer
         (724) 765-1310
         john.irvin@exone.com

The ExOne Company logo