Do you know any sole caregiver parents

who (relatively) successfully juggle a professional services/demanding job with raising their children?

I met one recently who is pretty high up at their firm and who I was somewhat in awe of as a result

I know a single mum from school.  She's a big 4 partner.  I met her for the first time at her son's 11th birthday party.  I'd always assumed the nanny was the mum.  

It's pretty normal to have kids who are raised by a helper in some countries. I know several folk in east asia who have kids, no partner and are depressingly successful by footloose ane fancy free standard never mind responsible for a whole family.