<timeline> ImageSize = width:800 height:100 PlotArea = left:65 right:15 bottom:20 top:5 AlignBars = justify Period = from:1997 till:2022 TimeAxis = orientation:horizontal ScaleMajor = unit:year increment:1 start:1997
Define $star = text:"*" textcolor:black shift:(0,3) fontsize:10
PlotData=
align:center textcolor:black fontsize:8 mark:(line,black) width:25 shift:(0,-5)
bar:CEO at: 2012.883 align:right $star at: 2016.417 align:right $star from: 1998.830 till: 2001.249 text:"Roberts" color:skyblue from: 2001.249 till: 2003.249 text:"Lynn" color:orange from: 2003.249 till: 2009.5 text:"Twomey" color:blue from: 2009.5 till: 2012.583 text:"Becktrom" color:red from: 2012.583 till: 2012.833 shift:(0,15) text:"Atallah" color:limegreen from: 2012.833 till: 2016.249 text:"Chehade" color:lavender from:2016:249 till:2016.417 shift:(0,15) text:"Atallah" color:limegreen from:2016.417 till:2022 text:"Marby" color:skyblue
</timeline>