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Support Staff

John Armstrong
Microbeam Specialist
Phone: 202-478-8918

John Armstrong has installed, maintained, and operated microprobes at NIST, Caltech, and Proctor & Gamble. He also has experience with several generations of analytical scanning electron microscopes, analytical scanning transmission electron microscopes, ion microprobes, x-ray diffraction and x-ray fluorescence equipment, and UHV field emission Auger electron and x-ray emission microprobes.


Alia Awadallah
DCO Program Assistant
Phone: 202-478-8818

Alia graduated with a degree in political science from Kent State University. Post graduation, Alia worked for the Middle East Research and Information Project in DC and for the Obama for America campaign. Her experience includes web administration and traffic analysis, implementing social media plans, and campaign strategy planning and voter data management. A105


Maceo Bacote
Building Engineer
Phone: 202-478-8302

Maceo joined GL in July 1993 to work as a DC 3rd class steam engineer, whose duties include the daily maintenance and repair of the HVAC system and mechanical equipment at BBR campus. He has resided in Clinton, Maryland for fourteen years with his wife and three children aged twenty-one, twenty-three and twenty-six.


Gary Bors
Building Engineer
Phone: 202-478-8302

Gary joined Carnegie in 1977 and he is the chief engineer at BBR. Some of his duties include the daily operation and maintenance of the cast iron sectional low pressure steam boilers, centrifugal and air-cooled water chillers, and the DX AC unit.


Roxane Bowden
Lab Manager
Phone: 202-478-8908

Roxane is the Lab Manager of Marilyn Fogel’s stable isotope facility at the Geophysical Laboratory. She is in charge of maintaining the two ThermoFisher gas source mass spectrometers and assisting students with preparing and analyzing samples. She obtained a PhD in stable isotope geochemistry from the University of Western Ontario, Canada in 2001, and a BSc in geology from the Memorial University of Newfoundland in 1991.


Katherine Crispin
MIcrobeam Specialist
Phone: 202-478-8986

Katherine's research is focused on diffusion in lower mantle minerals. She has investigated the effect of crystal field stabilization energy on diffusion rates of transition metals in periclase. She has developed, with Jim Van Orman, an equation combining various ionic traits (such as ionic radius and polarizability) to estimate diffusion rates in many minerals and compared them to published experimental data. She collaborates with Yingwei Fei and others on continuing high pressure and high temperature experimental work on diffusion in mantle and core minerals. She received a Ph.D. in Geological Sciences from Case Western Reserve University and a B.Sc. in Chemistry from Cedar Crest College.


Roy Dingus
Building Manager
Phone: 202-478-7968

Roy has been working as facility manager since 1984. He worked as a machinist at GL prior to his appointment as chief engineer and later, facility manager of BBR.


Pablo D. Esparza
Maintenance Technician
Phone: 202-489-4512

Pablo came to Carnegie from Jasco Guerrero, a small picturesque town in Mexico well-known for its silver mines. He worked there on construction jobs. Pablo handles all packages and mail for the campus as well as helps with maintaining facilities for both departments.


Dyanne Furtado
Staff Accountant

Dyanne is the Geophysical Laboratory's Staff Accountant. She is responsible for monitoring and tracking expenditures associated with the Lab's new Federal grants, as well as providing financial reports to the scientific staff. Prior to joining Carnegie, Dyanne worked for over 13 years at the German defense manufacturing company, Heckler & Koch as a Staff Accountant. She obtained a bachelor's degree from Gallaudet University in Accounting in 1986, and has lived in Virginia since 1989.


Paul Goldey
Electronics/Microbeam Specialist
Phone: 202-478-8456

Paul has more than 20 years of experience maintaining scientific instruments and laboratories as well as supporting students, faculty and staff in their research. He has worked at several local universities in laboratories for high energy physics, thin film deposition and characterization, and nanotechnology. Previously, Paul worked at the Advanced Electronics Laboratory of Georgetown University. Earlier he spent several years at CERN in Geneva while affiliated with the University of Maryland. Paul is in charge of designing and maintaining scientific instruments, including helping John Armstrong with maintenance and assisting users of our microbeam facilities.


Shaun Hardy
Phone: 202-478-7960

Shaun Hardy manages the joint research library of the Geophysical Laboratory and DTM and oversees the departments' archives. As campus librarian he designs and implements information programs and services to support the departments' scientific, administrative, and technical staff.


Stephen Hodge
Instrument Maker
Phone: 202-478-8921

Stephen Hodge was born in London, but grew up in the beautiful county of Wiltshire (the Cotswolds), England. After serving a four-year apprenticeship in mechanical engineering, he worked as a tool and diemaker with British Leyland. In 1979, he left England with several friends to work for Volkswagen of America in a stamping plant located in Charleston, WV. Hodge found the transition to America to be a great new experience, and he and his friends had a lot of fun in those early days.


Morgan Phillips Hoople
CDAC Project Administrator/Assistant
Phone: 202-478-8966

Morgan Phillips Hoople is the Project Administrator for the Carnegie/Department of Energy Alliance Center (CDAC), as well as the Assistant to Russell J. Hemley. She has been working at Carnegie since July of 2004. She received her B.A. in History from DePauw University in 2002.


Bill Key
Building Engineer
Phone: 202-478-8302

Bill began working at GL in 1983 as caretaker of the old building at BBR. His main duties included looking after the grounds, SMO and foundry on the BBR campus. In 1989, he became a licensed engineer whose responsibilities included maintenance and repair of the HVAC system and mechanical equipment. Prior to working at Carnegie, Bill served in the Air force with the 82nd Airborne division and also worked in a hardware store for five years after completing high school.


Danielle Appleby Kifah
Assistant to the Director
Phone: 202-478-8906

Danielle is the assistant to the director at the Geophysical Laboratory. Prior to joining Carnegie in 2007, Danielle worked as Consultation Executive for one of the top planning and PR firms in London, Local Dialogue LLP, where she led the consultation on large-scale public sector projects for the Mayor of London including "Crystal Palace Park Regeneration," the "Olympics 2012," and "Ocean New Deal for Communities Redevelopment."


Jeff Lightfield
Phone: 202-478-8903

Jeff Lightfield is responsible for the business operations of the Geophysical Laboratory. Prior to joining GL in February 2006, Jeff worked for eight years at Carnegie's headquarters; first as a Financial Accountant and then as the Deputy Financial Manager. Earlier in his career spent Jeff several years working in public accounting and served as the Director of Finance for Citizens Development Corps (CDC).


Victor Lugo
Instrument Maker
Phone: 202-478-8922

Victor Lugo is an instrument maker in the GL machine shop. He is a skilled machinist and supports activities in the shop, including maintaining, operating and producing scientific instruments for the department. 


Andrea Mangum
Deep Carbon Observatory Program Manager
Phone: 202-478-8816

Andrea Johnson Mangum joined the the Deep Carbon Observatory (DCO) in June 2010. She manages the DCO Secretariat—bringing together an international and multidisciplinary group of researchers to address the many outstanding questions surrounding the nature of carbon in Earth's interior. She will also address issues relating to the DCO’s developing strategies for communication, education, and outreach. Andrea, who has a M.S. in geology and experience as a science writer, previously worked for over 15 years in program management with the Ocean Drilling Program and Integrated Ocean Drilling Program.


Agnes Mao
Assistant to Ho-kwang Mao
Phone: 202-478-8960

Agnes Mao received her BA degree in Diplomacy from National Chen-Chi University, Taipei, Taiwan in 1966. She obtained her MLS degree in Library and Information Sciences from University of Maryland in 1970. From 1970 to 2000, she was working at various posts in the Collection Management Division at the George Mason University, VA. After her retired from 30-year librarian career at GMU, she works as a volunteer assistant to Dave Mao at the Lab.


Susana Mysen
EFree Project Administrator
Phone: 202-478-1083

Susana comes with a background in foreign service. She worked as an analyst in the Philippine Embassy in Washington, DC. After her tour of duty there, she served in the economics division in the home office in Manila. Subsequently, she returned to Washington.


Trong Nguyen
Assistant Controller
Phone: 202-478-8904

Trong came to the Geophysical Laboratory to join the new Support Staff in April 2006. rong worked as Financial Accountant at the P St. headquarters for 13 years before working at the Lab. He graduated from the School of Business Administration of George Mason University, and worked for the Fairfax County Public Schools before being employed by Carnegie. He lives in Annandale, Virginia with his wife and two children.


Gefei Qian
IT/IS Administrator
Phone: 202-478-8970

Gefei joined the Geophysical Laboratory  IT group in September 2008. He has been working in IT administration since 1990 and his interest in programing dates back to the 80's. Gefei is experienced in HPC computing, CISC system programing, software engineering, instrument control, netbotics, and IT services. He is enthusiastic to provide the GL staff with various excellent IT-related services.


Michelle Scholtes
Web/Departmental Assistant

As our new web content manager, she is in charge of website maintenance and development, as well as other tasks such as seminar preparation and event planning. Michelle has a broad range of skills including web management and expertise in implementing social media and marketing campaigns. Prior to joining Carnegie, she worked in administration in the real estate industry and telecommunications and advertising consultancies. She holds a B.A. in Public Relations from the University of Maryland, College Park (May 2009).


Guoyin Shen
HPCAT Director
Phone: 630-252-0429

Guoyin Shen's research covers a broad range of subjects aimed at understanding the behavior of materials under high-pressure and extreme temperature conditions. The research activities include investigation of phase transformations and melting lines in molecular solids, oxides and metals; characterization of liquids and amorphous materials under high-pressure/temperature conditions; measurement of crystal chemistry, elastic and transportation properties of deep Earth materials at pressure-temperature conditions equivalent to the Earth’s interior. His current research includes the study of structure and density of silicate liquids at high pressure and melting temperature determinations of silicates and iron alloys at Megbar pressures.


Gabor Szilagyi
Systems Administrator
Phone: 202-478-8973

Gabor Szilagyi has been appointed full time IT/IS Administrator to work alongside Gefei Qian. Gabor will focus on IT network and infrastructure support at the Geophysical Laboratory (GL) within the broader BBR IT support group. During the past year, Gabor has worked part time at GL and P St., and has been a great asset to our campus. We congratulate Gabor in his new role at GL and BBR.


Marilyn (Helen) Venzon
Accounts Payable Specialist
Phone: 202-478-8905

Helen started her first job as a Educational Specialist at the Cultural Office of the Embassy of Egypt. She then moved to Computer Sciences Corporation in Falls Church, Virginia, where she worked as a Sr. Human Resources Specialist for 8 years. She came to Carnegie in 2007. Helen graduated from Maryknoll College in the Philippines.


Merri Wolf
Library Technical Assistant
Phone: 202-478-7962

Merri Wolf's job as Technical Assistant at the Broad Branch Road Library since 1992 is the first position she has stayed at more than four years. Merri attributes her perpetual interest in her work to the people she has met here and the never-ending challenge and rewards of scientific endeavor she has had the privilege to observe. She had worked for doctors, lawyers, publishing and advertising executives, retail companies at the administrative and sales levels, nonprofits and professional sports before she came to Carnegie.