Ask HN: Managing more efficiently at work to spend time my kids?

I am at the end of my paternal leave and I am trying to figure out a way to get full pay without working full time at my current job.

Yeah, I am a “having a cake and eating it too” kind of guy.

Anyway - I work as a project owner in the construction industry. I have pretty good computer skills - hence HN.

The job consists mainly of administrative work, spreadsheets, business analysis, stakeholder management and so on.

Does HN have any tips on how to manage more efficiently so I can save some time from work to hang out my kid? Without destroying my future career prospects.