Below are some useful websites that allow screenwriters to pitch their scripts to Agents, Literary Managers, Producers, etc.
They only provide opportunities and the rest is up to you. They will charge a fee to pitch but this avenue does get around the "we do not accept unsolicited material".
Some of the websites offer classes and converge services.
As with all things please do your research.
Script Reader Pro - Screenwriting Pitch Sites: Are they really worth it?
IMDB Move Database - Internet Movie Database
It is always recommended that you copyright your work before submitting it to anyone.
The links below are websites that you can create a page dedicated to your screenplay, search for film festivals, and submit to them.
The links below are websites that you can create a place to host your screenplays and market them.
InkTip - Host your script for industry professionals to find.
ScriptHop - Packaging for Marketing Your Scripts.
Simply Scripts - Hosting page to sell your screenplays.
Movie Bytes - Marketing Services.
Below are some links that you can find industry jobs at.
TB - The Tracking Board - Industry News, Spec Market, and Jobs.
The ISA Insider - Writing Gigs, Contests, Coverage Services.
Screenwriting Staffing - Job and Script Search Board and more.
Craigs List - Los Angeles - Jobs and Stuff for Sale
Hub Staff Talent - Job Posting
Simply Hired - Job Postings
Stage 32 - Job Posting Board
UpWork - Freelance Job Postings