web scrape 28k records from website

I would like to pull some information for people on linkedin who meet a specific job title in a specific region. I am looking to collect the following:

LinkedIn Profile ID
First Name
Last Name
Current Job Title
Current Employer
Current City
Current State
Current Country
Pronoun
Number of connections on LinkedIn
Number of connections to Partners in the Big 4 Audit firm (KPMG, PwC, Deloitte and EY)
Big 4 firm last employed by
Current City of last Big 4 employer
Current State of last Big 4 employer
Current Country of last Big 4 employer
Number of years at last Big 4 firm employer
Year became a Manager at the Big 4 firm
Year became a Senior Manager at the Big 4 firm
Number of years as Senior Manager at last big 4
Number of years as Director at last big 4
Number of years as Managing Director at last big 4
Number of years as Partner at last Big 4
Picture

What I am looking for all people who have currently or in the past had the job title "Senior Manager" at KPMG, PwC, Deloitte and EY in the US.

Instead of doing all 4 companies at a go, select one company at a time,
then for each company, instead of search each all records in US state by state

Regards.