The following is from the Mercer SIRS high tech industry compensation survey as a summary description:
Implements Human Resources policies as a generalist, partnering with business operations to ensure a complete understanding of business needs and objectives and resolves HR issues. Responsible for and/or serves as a HR liaison for most of the following areas: succession planning, talent management, labor relations, employment, employee relations, compensation, benefits, EEO, and/or training and development.
This is a link to a pdf from the Office of Personnel Management (OPM) (Federal Sector) which details the HR family of series, theres a lot of terms that you can use to put together a job description that meets your needs and is tailored to public sector HR:
We have a resource over on Workology that could help with HR job descriptions. You can access it here https://workology.com/how-to-write-a-job-description/ and https://workology.com/download/hr-job-descriptions/
I hope this helps!