SQL Job, Linked Server, Domain Account

Clash Royale CLAN TAG#URR8PPPSQL Job, Linked Server, Domain Account
I think I have tried everything but I can't figure out how to set up an SQL Job that have a T-SQL Step that performs a SELECT on a linked server.
1) I got a Domain user mydomainSQLJob
2) I got a SQL 2017 server 'JOBSERVER' with the SQL Agent running log on as a domain user mydomainsv_agent (this cannot be changed). No futher rights should be given to this user either.
3) On the JOBSERVER I created a linked server
EXEC sp_addlinkedserver 'LINKEDSERVER'
4) mydomainSQLJob is data reader on a database on LINKEDSERVER
5) I am able to do a SELECT * FROM LINKEDSERVER... from JOBSERVER in a regular Query Window.
On JOBSERVER I have tried
ALTER DATABASE MyDatabase SET TRUSTWORTHY ON
And then set the job to execute in MyDatabase
I have also tried
Job Step Properties > Advanced > Run as user > mydomainSQLJob
I have tried adding mydomainSQLJob to the linked server on JOBSERVER both with and without Impersonate
Could someone let me know what the correct steps are ?
Thanks
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