The user account making that command does not have its ~/.ssh/id_rsa.pubdefault public SSH key registered in ~waccount/.ssh/authorized_keys on the tech-gerrit.sd.company.com server.
try executing the following command In the same command sequence
ssh -Tv -p 2941 firstname.lastname@example.org
That will display more details on the failed connection attempt.
If not possible, try and make sure the environment variable GIT_SSH_COMMAND is set with 'ssh -v'.