A former prosecutor, Efrem defends entities and individuals in "white collar" criminal matters. Efrem also conducts internal investigations, litigates complex business disputes in federal and state court, and advises on compliance matters.

Efrem has conducted internal investigations for publicly-traded companies, and has represented entities and individuals in criminal and administrative enforcement actions involving allegations of securities, health care and business fraud; government contracting, false claims, foreign corrupt practices and domestic political corruption; and tax and environmental violations. Efrem has represented clients in confidential matters before federal grand juries and in criminal prosecutions nationwide (W.D.Pa., M.D.Pa., E.D.Pa., E.D.N.Y., S.D.N.Y., W.D.N.Y., D.N.J., N.D.Oh., S.D.Oh., N.D.W.Va., S.D.W.Va., E.D.Ca., N.D.Ca., C.D.Ca., N.D.Ga., N.D.Il., D.Me., E.D.Mi., D.Ne., D.Or., N.D.Tx., S.D.Tx., D.Ut., and D.Vt.). He has also represented clients before numerous federal government agencies in administrative enforcement actions (S.E.C., C.F.T.C., O.F.A.C., H.H.S., E.P.A., etc.).

In civil matters, Efrem has litigated corporate and partnership disputes, media, banking and securities matters; health care issues; and other commercial cases.

Efrem is a frequent speaker on the attorney client privilege, SEC enforcement proceedings, internal investigations, corporate compliance initiatives and the sentencing guidelines. He has lectured at the ABA National Institute on Internal Corporate Investigations, the University of Pennsylvania Law Review’s 2011 Symposium on Sentencing Law, and for the Pennsylvania Bar Institute, the Pennsylvania Association of Criminal Defense Lawyers, the Pennsylvania Health Care Association, the ABA National Institute on the Civil False Claims Act and Qui Tam Enforcement, the National College of District Attorneys, the Los Angeles County Sheriff's Department, and the University of Pittsburgh School of Law