How do I get access to the object which the Timer is attached to?
public void DoStuff()
        {
            List<IProcess> processorsForService1  = processorsForService1 = ProcessFactory.GetProcessors();

            foreach (IProcess p in processorsForService1)
            {
                if (p.ProcessTimer != null)
                {
                    p.ProcessTimer.Elapsed += new ElapsedEventHandler(IProcess_Timer_Elapsed);
                }
            }
        }

private void IProcess_Timer_Elapsed(object sender, ElapsedEventArgs e)
            {
                IProcess p = (IProcess)sender;
                p.Step_One();
                p.Step_Two();
            }

private void MyTimerCallbackMethod(object state)
{

}

var timerCallback = new TimerCallback(MyTimerCallback);
var timer = new Timer(timerCallback, myStateObject,
    Timeout.Infinite, Timeout.Infinite);

public void DoStuff()
{
    List<IProcess> processorsForService1 = ProcessFactory.GetProcessors();
    foreach (IProcess p in processorsForService1)
    {
        if (p.ProcessTimer != null)
        {
            p.ProcessTimer.Elapsed += (s, e) =>
            {
                p.Step_One();
                p.Step_Two();
            };
        }
    }
}

p.ProcessTimer.Elapsed += new ElapsedEventHandler(p.IProcess_Timer_Elapsed);

class IProcess
{
  public delegate void Timer_Elapsed_Handler (IProcess process, ElapsedEventArgs e);
  public event Timer_Elapsed_Handler Timer_Elapsed;

  public void IProcess_Timer_Elapsed (object sender, ElapsedEventArgs e)
  {
    if (Timer_Elapsed != null) Timer_Elapsed (this, e);
  }
}