HR Generalist
SewerAI Corp
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Benefits offered by this job
Job summary
SewerAI Corporation is expanding its People Operations team and seeks an experienced HR Generalist in Walnut Creek, CA. You will own core HR processes, benefits administration, payroll coordination, and HRIS data integrity while partnering with Finance and Recruiting to scale the organization.
Ideal candidates bring 4+ years of HR experience, solid knowledge of California employment law, and comfort with Rippling, Carta, Notion, and Google Workspace.
Qualifications
- 4 years of hands‑on HR experience, either as a generalist or in a specialty area.
- Working knowledge of California employment requirements.
- Comfortable owning HRIS, payroll coordination, and benefits administration.
- Proficient with Rippling, Carta, Notion, and Google Workspace; capable of using AI tools to improve processes.
- Highly organized, detail‑oriented, execution-focused with a self‑starter mindset.
- Thrives in a fast‑paced startup with changing priorities and cross‑functional collaboration.
Responsibilities
- Manage day‑to‑day HR activities across the full employee lifecycle.
- Coordinate benefits, 401(k), and leave programs with accuracy.
- Assist in payroll inputs and changes in partnership with Finance.
- Maintain HRIS data integrity and headcount reporting.
- Support onboarding, offboarding, and HR policy administration.
Skills
Tools
Job description
SewerAI is on a mission to give infrastructure professionals superhuman capability, and we're looking for exceptional people to help us build it. Join a fast-growing team doing work that protects the underground systems millions of people depend on every day.
SewerAI is a fast-growing infrastructure tech company on a mission to modernize how utilities manage their underground assets. You'll work alongside world-class engineers, data scientists, and sewer industry experts, building software that directly improves the safety and efficiency of critical infrastructure for millions of people.
We believe the best work happens when people are empowered, trusted, and challenged. Our culture is built on transparency, accountability, and a shared passion for impact. We move fast, take ownership, and celebrate wins together.
- ▸ Mission-driven: every action improves real infrastructure
- ▸ Ownership mentality: we trust you to lead your work
- ▸ Transparent by default: open communication at every level
- ▸ Diversity of thought: we value different perspectives and backgrounds
- ▸ Work-life balance: we work hard and respect your time outside work
“In my time as a software engineer at SewerAI, I've had the joy of working on interesting and varied challenges in a field most people never think about—despite relying on it every day. I've had the privilege of being part of a kind, welcoming team full of people whose incredible skills I learn from daily. And I've experienced the real satisfaction of contributing to solutions that address real-world infrastructure problems, supporting systems that are essential to both public health and the environment.”
“I joined SewerAI in August of 2024 to a tiny SDR team of 3 people. Fast forward and the company has doubled size with a robust go to market team. From when I first joined as an SDR to now, managing Go-To-Market for the North East, there wasn’t a time where I felt like the company wasn’t focused on providing the best possible service to its customers - even taking in suggestions from a total newbie like I was. Ultimately, if the idea helps the people who were focused on helping, then it was always worth hearing. The truth is, if you’re a part of the SewerAI team, than you’ve got a voice in helping improve the greatest infrastructure services this century.”
“When I joined SewerAI, the HR team immediately set the tone for the entire company culture. Honestly, in my past roles at bigger companies, HR felt like an invisible force, focused solely on protecting the business and enforcing policies, which made it hard to feel seen as an actual person.My experience here has been the complete opposite. From the start, my expectations for how a company treats its people have been exceeded. Our HR has been the heart of it all, proving that caring deeply and being responsive to the people who make up the company is the main initiative.My positive experience with the culture at SewerAI began with our HR lead and continues to be led by them as I continue my journey and as the company quickly expands!”
Hear from CEO and Co-Founder Billy Gilmartin on what drives SewerAI and the kind of people who thrive here.
One week. The whole team. Our favorite customers. This is SewerAI at its best.
Sales team member Marissa Oudt on building a career with purpose, breaking into male-dominated industries, and why SewerAI is worth betting on.
A love letter to the infrastructure professionals keeping cities moving — and a better way to help them get it done.
Comprehensive medical, dental, and vision coverage for you and your family.
Meaningful equity so you share in the company's long-term success.
Remote and Hybrid friendly environment with flexible hours.
Annual learning budget for courses, conferences, and professional growth.
Take the time you need to recharge and bring your best self to work.
Work alongside talented, mission-driven people who genuinely care about impact.
- $108K – $115K
About SewerAI Corporation
SewerAI is transforming underground infrastructure management through AI-powered inspection and risk analysis. Our platform helps contractors, engineering firms, and utilities unlock valuable insights from sewer inspection data—turning hours of manual video review into actionable intelligence in minutes. After doubling our customer base over the past year, we’re now entering an exciting phase of accelerated growth.
About the Role
SewerAI is hiring an HR Generalist to help scale our 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.
You bring 4+ years of hands‑on HR experience, whether as a generalist or in a specialty area, and you thrive in a fast‑paced startup environment where priorities move quickly and every team member plays a meaningful role. You will 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 we Demand Greatness — holding ourselves and each other to a high standard while supporting one another in doing meaningful work that impacts the communities and infrastructure we serve. This position is designed with a clear path into a more senior HR role over time.
What You'll Do
Core HR & People Operations
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.
People Programs & Employee Experience
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 elevate 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.
Office & Systems Support
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.
What Success Looks Like
Core HR operations — benefits, payroll, 401(k), leave, and HRIS — run accurately and on time without leadership intervention.
Compliance and documentation are current, organized, and audit‑ready.
Employees receive timely, accurate support across HR, benefits, equipment, and internal processes.
People programs run smoothly without escalation and become more consistent, scalable, and reliable as the company grows.
People leadership is freed from execution to focus on strategy, employee relations, retention, and manager development.
Who You Are
4 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.
This role is designed as a pipeline into a more senior HR position. As SewerAI grows, it will take on deeper ownership across benefits and compliance strategy, policy administration, employee relations, People program design, and cross‑functional partnership with Finance, Recruiting, and leadership.
Competitive salary ($108,000–$115,000 base, commensurate with experience).
Full benefits package.
Hybrid schedule based in Walnut Creek, CA.
High‑growth environment with real advancement opportunity.
The chance to help shape People Operations at a fast‑growing company.
SewerAI is proud to be an Equal Opportunity Employer. We are committed to providing a workplace free from discrimination or harassment on the basis of age, disability, sex, race, religion or belief, gender reassignment, marriage/civil partnership, pregnancy/maternity, or sexual orientation. All your information will be kept confidential according to EEO guidelines.
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