Our Department Managers are active technicians who oversee department operations & perform quality control functions throughout each stage of production. Weekly manager meetings facilitate open lines of communication to maximize productivity & efficiency.

STEVEN J. BLAKE – Crown & Bridge – Metal & Quality Assurance

img_8289_smallerSteven J. Blake, Co-Manager of our Metal Crown & Bridge Department and Manager of our Quality Assurance Department, joined Friendship in 1981. After 20 years of hands-on experience as a technician in multiple departments, Steve transitioned to Management in Crown & Bridge.  He is a dedicated, hard-working perfectionist with an eye for detail, a passion for the industry and a drive to always excel.

MARY COXON – Quality Control

marycoxonbioMary, Quality Control Manager began working in our Crown & Bridge Metal Department in 1982, fabricating wax-ups & metal frameworks.  After gaining hands-on experience in the Porcelain Department and comprehensive knowledge of all our crown & bridge products, she transitioned to management.  Mary interacts with our doctors on a daily basis, calling with questions regarding shades, materials, margins, etc. She manages work flow within the departments and checks outgoing cases for precision and accuracy.


dj-biophotoDJ manages the Model Department in our Fixed lab. He joined our team in 2008 as a Model Technician and has had extensive training in all aspects the Department. DJ’s motto and encouragement to his team is “Do it right the first time.”  He understands the importance of fabricating and articulating a precise model, as it is the foundation of every case.  DJ’s great organizational and leadership skills help the Department run smoothly and efficiently.

SAVAS KILLIAS – Die Trimming

IMG_8134_smallerSavas, Die Trimming Manager, joined our team in 1991 and received his certification in SPA (Simplified Posterior Anatomy) through PTC (Productivity Training Corporation). He has worked in several departments within the lab; Model, CAD/CAM and Removable. His primary duties include trimming dies, overseeing the department, casting metal and accepting digital intra-oral scan files from Cadent iTero, Lava COS and 3M True Definition. Savas enjoys interacting with our doctors on a daily basis to ensure their preferences are met. With his attention to detail, he strives for a perfect, passive fit, producing consistent, high-quality work.

 TONY VLASSIS, CDT – Crown & Bridge – Ceramics

Tony manages our Ceramic, e.max® and Porcelain Fused to Zirconia (PFZ) departments. He graduated from The Polytechnic Institute and University of Maryland in Baltimore, starting his dental career as one of our first employees in 1976. He has had the unique opportunity of working closely with the area’s leading universities, dentists, prosthodontists and patients. He is highly qualified as a consultant in complex, inter-departmental, full-mouth restorations, product selections, custom shades, cementation options and dental adhesives.

TINA PRELIA – Stain & Glaze

Tina New BioPicTina Prelia joined our Stain & Glaze Department in 2011 and was trained by founder Gus Diacoloukas, CDT. With an attention to detail & a strong work ethic, she became proficient in her craft, taking over management of the department in 2016. Tina distributes, oversees & QC’s all work in the department, as well as adds contacts & ridges, performs minor repairs, works with difficult stain cases, provides training to her team & maintains the flow of work to ensure cases meet their due dates & are finished on time.  Tina takes pride in achieving extraordinary esthetics on her restorations, knowing that what she does makes a difference & brings happiness to many patients.


sandy-bio-pic Sandy manages our CAD Contour Department.  Her dental career began in 1980, opaquing in the ceramic department. She received PTC Certifications in Simplified Posterior Anatomy, Contouring Anterior & Posterior Bridges, Anterior & Posterior Porcelain Application & Color In Dental Ceramics. As a senior technician & highly skilled ceramist, Sandy oversees the fit & contour of our Sculpture Full-Contour Zirconia & PFM restorations. Her specialties include implants, large anterior cases & challenging repairs.


Maggie Sheehan, Temporary Department Supervisor, joined our team in 2013 with an extensive background in art, dedication & a thirst for knowledge. Mentored by Gus Diacoloukas, CDT, Robin Robinson, CDT, Dena Hehring & Mike Backoff, CDT, she was trained by the best. Maggie is diversely skilled in many departments: CAD/CAM Scanning, Sculpture, Milling Machine Operations, Fit & Contour, Spray Opague, etc. With comprehensive training & experience in anteriors & temporaries (including implants), Maggie articulates & preps models, works with Gradia & Radica composite materials & trains others. Maggie is very grateful for her daily interactions with our doctors, as she proudly provides outstanding temporary products & support.



20160805_083846_editted Lisa manages our e.max® Department. She joined our team in 1988 as a Ceramist & was trained by Tony Vlassis, CDT & Sandy Zagraiek. Lisa received PTC Certifications in Dental Anatomy & Anterior Contours. With an attention to detail & a clear understanding of ingot selection & shade computation, she specializes in large, esthetically-challenging anterior cases. Lisa enjoys the fast-paced dynamics of the dental industry & gains satisfaction in knowing that her work makes a positive impact on patients’ lives.


Dena, Co-Manager of our CAD/CAM Department, joined our team in 2005. Mentored by Director of Training, Robin L. Robinson, CDT, Dena worked for 6 years in the Porcelain Department. She received certificates from PTC for Anterior & Posterior Porcelain Application & Simplifying Posterior Dental Anatomy.

Dena has been an integral part of the CAD/CAM Department since its inception in 2009. As Co-Manager with Valanti Diacoloukas, Dena oversees the Department, performs daily design functions & works closely with our doctors. She manages our Trios, DDX (Planmeca) & Carestream systems. Her strong work ethic & dedication to learning the latest technologies creates a high level of efficiency. She excels in larger, challenging restorations & is excited to see what the future holds for the dental industry.


CADCAM8_CroppedSmaller Valanti co-manages our CAD/CAM Department with Dena Hehring. He started working with us during the summers of 2009 & 2010, mentored by his grandfather & founder, Gus Diacoloukas. In 2011, Valanti came on board full-time in our e.max® Department, spruing & investing.  He received comprehensive hands-on-training from his dad, Nick Diacoloukas & specialized training on the Weiland mill. Valanti shares the family passion for the industry, as he manages our MCX5 & Weiland mills & our CEREC & 3shape systems.


Mike, Manager of our Implant Department, obtained his CDT status in 1993. He joined the United States Army’s dental division as a technician in 1981. From 1981 to 1996, he worked in a small, high-quality lab where he trained technicians across various levels of experience. For nine of those years, he was an in-house technician for a perio-prosthodontist, where he acquired his implant experience. He joined the Friendship family in 2003, working in the Crown & Bridge, Implant & Ceramic Departments & has been managing the Implant Department since 2008. Mike excels in the design & fabrication of difficult prosthodontic/implant cases. He conducts individual training seminars for Implant Specialists to keep them informed on new products & technologies.

MATTHEW BERGEN, CDT – Screw-Retained Hybrid Chairside Conversions

mattbiopicMatthew, previous co-manager the Metal Crown & Bridge Department, e.max® and Sculpture Departments, travels to your specialist’s office to perform Chairside Conversions for our Screw-Retained Hybrid Cases.  He also assists with the flow of our  Cadent Itero and 3m True Definition scans.  His dental career began in 1982 as a Crown & Bridge technician. He joined our team in 2010 working in Ceramics and Implants, then moved on to waxing and casting PFM’s. Matt received his CDT certification in Nov 2015.

KIRSTEN HUGHES – Digital Implant Tx Planning & Guided Surgery

kirstenbiopic_edited Kirsten, our Digital Implant Coordinator, joined our CAD/CAM Department in 2012 as a master scanner and troubleshooter.  In 2014, she transitioned into the Implant Department with Mike Backoff, CDT and 35-year senior Implant Department Manager/ Technician. Mike brings the “old school” hands-on/analog experience and Kirsten brings the “new school” computer technology. When combined, they bring the best of both worlds to accommodate your every need. Kirsten works with our doctors in Digital Treatment Planning of Surgical Guides as well as scanning and designing implant-related CAD/CAM products; abutments, bars, bridges, ASC Frameworks & IOS Implant Scanning. Her dedication and commitment help ensure the long term success of your cases from start to finish.


Gus, Manager of our Removable Department, joined our team in 1979 as a Crown & Bridge Technician, then 2 years later transitioned to working with removables. With dedication, passion & exceptional artistic skills, Gus is a master at his craft. He & his team have been an integral part of the growth of our Removable Department and he is most excited about the addition of CAD/CAM Digital Dentistry. Gus takes pride in knowing that his work positively impacts patients’ lives.

LOLA GIKAS – Removable

Lola, Assistant Manager of our Removable Department, joined our team in 1996 as a Denture Technician. She has worked with every component & product within our Removable Department, but her expertise is with the setup & creation of premium-quality dentures. Lola has had the distinct privilege of being trained by Gus Karagianopoulos, CDT & former Owner Gus Diacoloukas, CDT Lola directly communicates with our doctors & their staff in the effort to determine the most appropriate products for their patients.

BRIAN JONES, CDT – Cast-Partial

brianbiopic Brian, Manager of our Cast Partial Department, has been a Dental Technician since 1996. In 2008, he joined our Crown & Bridge Department, then transitioned into our Partial Department alongside his father Buddy, who at that time was our Cast Partial Department Manager. Buddy mentored Brian, provided formal training & taught him the fundamentals of cast framework design and fabrication. With an attention to detail & a passion for the industry, Buddy & Brian make a great team, as they still work together today.