Finally I use 2 tokens.

But I'm not sure it is the best solution.

$myRes = Invoke-Sqlcmd -Query "Select job_id, name From msdb.dbo.sysjobs Where job_id = Convert(Uniqueidentifier,$(ESCAPE_NONE(JOBID)))"

$myJobName = $myRes.name

$myRes = Invoke-Sqlcmd -Query...