HR Generalist

SewerAI Corporation•Walnut Creek, CA

16d•$108,000 - $115,000•Hybrid

About The Position

SewerAI is hiring an HR Generalist to help scale its People function and support an exceptional employee experience as the company continues to grow past 100 employees. This role adds dedicated, experienced capacity across People Operations, HR administration, the employee lifecycle, and HR compliance. The ideal candidate will have 4+ years of hands-on HR experience, thrive in a fast-paced startup environment, and work closely with the Head of People and partner with the Recruiting team to keep People processes, employee support, and HR operations running smoothly as the organization scales. At SewerAI, the company culture emphasizes "Demand Greatness"—holding oneself and others to a high standard while supporting each other in doing meaningful work. This position is designed with a clear path into a more senior HR role over time.

Requirements

5 years of hands-on HR experience, as a generalist or in a specialty area (e.g., benefits, HRIS, compliance, or employee relations).
Working knowledge of HR compliance, ideally including California employment requirements.
Comfortable owning HRIS, payroll coordination, and benefits/401(k) administration.
Technology savvy and comfortable across multiple systems — experience with Rippling, Carta, Notion, and Google Workspace (Docs, Sheets, Slides, Drive, Calendar), or the ability to quickly become proficient.
Makes effective use of HR and AI tools (e.g., Notion, HRIS, and AI assistants) to work more efficiently and improve People processes.
Highly organized, detail-oriented, and execution-focused, with a self-starter mindset and strong bias toward action.
Comfortable in a fast-paced startup environment where priorities move quickly and there is always something to build, improve, or solve.
Strong judgment and discretion with confidential and sensitive information.
Able to be in the office at least 2 days per week and reside within a 40-mile radius of Walnut Creek, CA.

Responsibilities

Support day-to-day HR activities across the full employee lifecycle.
Administer benefits, 401(k), and leave programs — processing, changes, and audits — and serve as a first point of contact for employee questions.
Partner with the Head of People on benefits renewals and Open Enrollment, including employee communications, coordination, and enrollment support.
Coordinate payroll inputs and changes in partnership with Finance, ensuring accuracy and timeliness.
Own HRIS data integrity — records, reporting, and system hygiene — and generate People reports and dashboards for leadership.
Build and maintain accurate headcount data in Rippling, keeping records current and reporting-ready, and ensure employee data accuracy across People systems such as Rippling and Carta.
Coordinate offboarding logistics and equipment returns.
Support HR compliance initiatives, audits, and documentation across applicable federal and California requirements.
Maintain People policies, documentation, and internal People resources, and support and maintain the People intranet workspace in Notion.
Administer engagement and pulse surveys and prepare clear reporting on the results.
Support the company's 360 performance review program, including coordination, communications, tracking participation, and supporting leaders through the review cycle.
Assist in training managers on HR procedures, policies, and People processes to ensure consistent and compliant practices across the organization.
Create and distribute a monthly internal employee newsletter and support company-wide communications related to People programs and initiatives.
Provide day-to-day employee relations support and escalate sensitive matters to the Head of People with sound judgment.
Support employee engagement activities, internal People programs, onsites, offsites, and company travel logistics.
Partner with Recruiting on joint initiatives such as employer branding, candidate experience, and hiring events.
Handle office duties including mailings, shipments, and company swag — including new-hire welcome materials — ordering, packaging, and distribution.
Manage equipment ordering and coordinate with IT to support employees across the company.