Senior Recruiter and People Operations
About SirenOpt
SirenOpt helps manufacturers make better, safer, and more reliable micro- and nano-materials. These materials are crucial for sectors like batteries, computer chips, aircraft components, and power systems. However, increasing demand and complexity are making production more challenging, leading to inefficiencies and risks. SirenOpt addresses this by providing a manufacturing intelligence platform that scans materials to reveal critical internal information, enabling manufacturers to improve yield and performance.
Role Overview
SirenOpt is seeking an experienced Senior Recruiter to build and scale a high-performing team while supporting core HR operations. This role is essential for shaping hiring strategy and HR infrastructure from the ground up, working closely with leadership and cross-functional teams.
What You’ll Do
Own full-cycle recruiting across technical and non-technical roles (sourcing, screening, coordinating interviews and on-site visits, and closing candidates)
Partner with hiring managers to define role requirements, interview processes, and hiring strategies
Build and maintain strong candidate pipelines for current and future critical roles
Manage and optimize the Applicant Tracking System (ATS) and recruiting workflows, ensuring an excellent candidate experience
Cover interviews, candidate communications, and offer processes
Identify when to engage external search firms for specialized or senior roles, and manage those relationships and associated search processes
Support onboarding and new hire orientation to ensure a smooth employee experience
Aid with HR operations including employee records, compliance, and policy administration
Develop and document HR and recruiting processes, policies, and best practices
Contribute to employer branding efforts (careers page, LinkedIn presence, events, and referrals)
What We’re Looking For
Bachelor’s degree in Human Resources, Business Administration, or related field
8+ years of experience in recruiting, with exposure to HR responsibilities
Demonstrated experience owning recruiting across a wide variety of functions including both technical and non-technical roles
Proven ability to partner with leadership and hiring managers on workforce planning and hiring strategy
Familiarity with processes such as onboarding, compliance, and employee lifecycle support
Strong organizational and communication skills with attention to detail
Startup experience is strongly preferred, including a demonstrated ability to manage multiple priorities effectively in a fast-paced environment
Experience with ATS platforms (e.g., Greenhouse) and recruiting tools
Exposure to HRIS systems, payroll coordination, and benefits administration
Hands-on experience with HRIS, payroll coordination, and benefits administration; familiarity with Gusto is a strong plus
Why Join SirenOpt
Opportunity to make a direct impact in building a growing, mission-driven company
Work closely with leadership and influence hiring and HR strategy
Fast-paced, collaborative startup environment with high ownership
Exposure to cutting-edge technology in advanced manufacturing and AI
Pay & Benefits
Base Pay Range: $110,000 USD - $140,000 USD
Benefits: Equity and Salary compensation depends on experience
Health, Dental, Vision plans provided
401k matching provided
Time off: 20 days of PTO per year, plus approximately 15 paid US holidays per year