Senator, Maryland State Senate, 2002-2013

Majority Leader, Maryland State Senate, 2011-2013

Candidate, United States House of Representatives, District 6, 2012

Deputy Majority Leader, Maryland State Senate, 2007-2011

Member, Transit Task Force, Montgomery County, 2011-present

Member, Blue Ribbon Commission on Maryland Transportation Funding, 2010-present

Member, Health Committee, Eastern Regional Conference, 2010-present

Member, Council of State Governments, Southern Legislative Conference, 2003-present

Member, Advisory Council to the Children's Cabinet, 2007-present

Member, Health Care Delivery Reform Subcommittee, Maryland Health Care Reform Coordinating Council, 2011-present

Member, Health Committee, National Conference of State Legislatures, 2007-present

Alternate Member, Intergovernmental Affairs Committee, National Conference of State Legislatures, 2003-present

Member, Maryland Electric Vehicle Infrastructure Council, 2011-present

Member, Joint Committee on Children, Youth, and Families, Maryland State Senate, 2012-2013

Chair, Democratic Caucus, 2007-2011

Member, Joint Legislative Work Group to Study State, County, and Municipal Fiscal Relations, Maryland State Senate, 2009-2010

Member, Joint Technology Oversight Committee, Maryland State Senate, 2008-2009

Senate Chair, Joint Committee on Children, Youth, and Families, Maryland State Senate, 2005-2008

Member, Task Force on Health Care Access and Reimbursement, 2007-2008

Member, Law and Criminal Justice Committee, Southern Legislative Conference, 2003-2007

Senate Co-Chair, Maryland Veterans Caucus, 2004-2007

Member, Task Force on Renewable Alternative Fuels, 2007

Member, Task Force to Study State Assistance to Veterans, 2006-2007

Member, Joint Committee on Administrative, Executive & Legislative Review, Maryland State Senate, 2003-2006

Member, Joint Committee on Legislative Ethics, Maryland State Senate, 2003-2006

Member, Joint Committee on Welfare Reform, Maryland State Senate, 2003-2006

Member, Judicial Proceedings Committee, Maryland State Senate, 2003-2006

Member, Law and Criminal Justice Committee, National Conference of State Legislatures, 2003-2006

Member, Senate Special Commission on Medical Malpractice Liability Insurance, 2004

Attorney, Greenberg Traurig, Limited Liability Company, 1998-present

Attorney, Stein, Sperling, Bennett, DeJong, Driscoll & Greenfeig, Private Corporation

Sergeant, United States Army Reserves, 1995-2001

Senior Congressional Aide, United States House of Representatives, 1994-1998

Member, Advisory Board, Institute for Governmental Service, University of Maryland, College Park, 2004-present

Member, National Conference of State Legislatures, 2003-present

Member, Maryland State Bar Association, 2001-present

Member, Montgomery County Bar Association, 2001-present

Member, American Bar Association

Member, Council of State Governments

Member, District of Columbia Bar Association

Member, Advisory Council for Children, 2005-2007

Member, Advisory Board, Institute for Governmental Service and Research, University of Maryland, College Park, 2004-2005

Member, Board of Directors, Clean Energy Partnership, Incorporated, 2004

Member, Board of Trustees, Germantown Alliance, 1999-2001

Vice President/Board of Directors, Gaithersburg-Germantown Chamber of Commerce, 2000-2001

President, Germantown Democratic Club, 1999-2001

Vice President, Germantown Citizens Association, 1998-2000

Co-Chair, Germantown Harvest Parade Committee, 2000

Vice President of Economic Development, Gaithersburg Chamber of Commerce, 1999

Vice President Economic Development, Germantown Chamber of Commerce, 1999