As most consultants work as independent contractors, they often need to sign agreements beyond a PSA.
One of these will likely be a master services agreement (MSA). An MSA establishes an ongoing client-consultant relationship.
Another contract is a non-disclosure agreement (NDA), which helps clients maintain the confidentiality of sensitive information and trade secrets.
Other relevant agreement types may include service level agreements (SLAs), statements of work, and subcontractor agreements.
PandaDoc document workflow software can help you manage all your consultant-related legal documents.