If you are considered senior management, headhunting agencies and LinkedIn are the way to go. ALONG WITH Networking. Reach out to people you know at the companies / jobs you see advertised.
If below senior management, local placement agencies, LinkedIn and sites like dice.com etc are great. You uploading a resume will trigger off actions. Just be really ready with your resume when you upload, recruiters look once and if not interested, they dont come back. Dont upload a half hearted attempt. Also these days crawlers (think search engines) look over resumes for keywords and push them to recruiters. So dont just say you are a Java developer, put in the things that make you shine - like hey you coded artificial intelligence (AI) in Java and Python. The bots will look for AI, RPA, Java, Python together in search strings and push you to the top of the pile.
Best of luck.
I know this is not directly related to layoffs, but I found this post by @WsOF3Ty-jdp on another thread on the DXC board and thought that it may provide some helpful info for the folks that are looking for a new job.