Whats my Job Title

Hello Tech Republic Community,

I work for a small IT company in New Zealand.
Their is 12 here all up.
I’m second in charge to the Owner, His core focus is Sales and BDM.
I’m previous position was Senior systems engineer.
I am still in this role however my Daily tasks include,
Team Leader,
Service Delivery Lead.
Tech pre sales.
Solution design.
I also look after the customer facing invoices.

What do you call his?
Operations Manger?

Cheers,
MasonNZITG