Board of Directors
President
Stephen G. Lippy, P.E., DEE
Refuse Disposal Chief
Bureau of Solid Waste Management
Baltimore County, Department of Public Works
111 West Chesapeake Avenue, Room 225
Towson, MD 21204-4603
Tel. (410) 887-2009
Vice President
Robin Ennis, Chief, Collections Section
Montgomery County, Solid Waste Division
101 Monroe Street
Rockville, MD 20850
Tel. (240) 777-6401
Secretary
Robin M. Roddy, P.E., BCEE
Delaware Solid Waste Authority
1707 East 12th Street
Wilmington, DE 19809
Tel. (302) 764-5385
Treasurer
Steven G. Tomczewski
Executive Director, Environmental Operations Group
Maryland Environmental Service
259 Najoles Road
Millersville, MD 21108
Tel. (410) 980-6307
Chapter Director
Douglas E. Sawyers, P.E., BCEE
Vice President
Malcolm Pirnie, Inc.
3101 Wilson Boulevard, Suite 550
Arlington, VA 2201
Tel. (703) 351-9100
Director (Past President)
Michael F. Houlihan, Principal
Geosyntec Consultants
10015 Old Columbia Road, Suite A-200
Columbia, MD 21046-1760
Tel. (410) 381-4333
Directors
Peter Bieniek, Chief
Cecil County, Solid Waste Division, Central Landfill
758 East Old Philadelphia Road
Elkton, MD 21921
Tel. (410) 996-6275
Hallie Clemm
DC Department of Public Works
2750 South Capitol Street, SE
Washington, DC 20032
Tel. (202) 645-4301
Frank R. Henderson
Retired
Tel. (410) 836-9473
Steve Lezinski
Engineer III
Montgomery County, Division of Solid Waste Services
16101 Frederick Road
Derwood, MD 20855
Tel. (301) 926-1283
Dana Murray, P.E.
Project Manager
SCS Engineers
1120 Roger Bacon Drive
Reston, VA 20190
Tel. (703) 471-6150
Elizabeth H. Smolen
Section Head, Research & Development
Department of Environmental Resources & SW Management
Prince George's County
9400 Peppercorn Place, Suite 520
Largo, MD 20774
Tel. (301) 952.7628
Evelyn E.. Tomlin, P.E., Chief
Bureau of Environmental Services
Howard County
6751 Gateway Drive, Suite 514
Columbia, MD 21046
Tel. (410) 313-6451
Mehal Trivedi
Engineer/Project Manager
Frederick County
12 East Church Street
Frederick, MD 21701
Tel. (301) 600-3043
Aigen Zhao, PhD., P.E.
Vice President - Engineering
Tenax Corporation
4800 East Monument Street
Baltimore, MD 21205
Tel. (410) 522-7000 x2224
