Take a look at the About section and note the website, phone number, company size, founded in and headquarters. Who works at the company? If the names are obfuscated then you can reverse image search their profile picture.
When it comes to pictures the company has posted, can you see employee badges, open computers(OS, computer type, applications, etc) or inside of the building?
You can get an employee name by taking their LinkedIn header and searching it on Google
site:linkedin.com/in/ "* at TCM Security"
Other resources
Indeed can be used to view job posting made by the company and gain insight on how they're running things on the inside.
Unnecessary internal information disclosed on Indeed job posting
