Strategic HRBP for High-Growth Defense Tech

Castelion; Torrance (CA); On-site; USD 90,000 - 130,000; Full time

Job summary

Castelion is seeking a Human Resources Business Partner (HRBP) to serve as a strategic advisor to leaders and employees, guiding organizational effectiveness, talent development, and workforce performance across Castelion.

This role partners with business leaders to align people strategies with objectives, offering guidance on design, performance management, employee relations, leadership development, and workforce planning in a fast-growing environment.

Qualifications

• 5+ years of progressive HR experience, including HRBP work with technical, engineering, or manufacturing teams.
• Experience supporting both exempt and non-exempt populations in a fast-paced environment.
• Strong knowledge of employment law, employee relations, and HR best practices.
• Ability to influence without authority and build credibility across all levels.

Responsibilities

• Partner with business leaders to improve organizational performance, workforce planning, and team effectiveness, maintaining a 95%+ leadership satisfaction rating through proactive HR support.
• Provide strategic coaching that enables leaders to resolve 90%+ of employee relations and performance matters without escalation.
• Develop and execute people strategies that improve retention, organizational health, and business outcomes, contributing to year-over-year improvements in key talent metrics.
• Lead workforce planning, talent reviews, and organizational design initiatives that ensure 100% of critical roles have succession or staffing plans.
• Partner with leaders to identify and develop high-potential talent, achieving 90%+ completion of annual talent calibration and development plans.
• Coach leaders through performance management, investigations, and employee relations matters while maintaining 100% legal and policy compliance.
• Ensure 95%+ of performance improvement plans, corrective actions, and investigations are completed within established timelines and documentation standards.
• Coach managers to improve leadership capability, accountability, communication, and decision-making, resulting in measurable improvements in team performance.
• Partner with leaders to increase manager effectiveness, with 90%+ of leaders demonstrating improvement against leadership development objectives.
• Identify and implement process improvements that reduce administrative effort and improve service delivery, targeting 20%+ annual efficiency gains across HR processes.
• Drive People initiatives that reinforce Castelion's culture of ownership, accountability, urgency, and continuous improvement while maintaining 95%+ completion of key annual People programs.

Skills

HR Business Partner experience

Influence without authority

Analytical skills

Stakeholder management

Fast-paced environment

Education

Master's degree / HR certification

Job description

Castelion is seeking a Human Resources Business Partner (HRBP) to serve as a strategic advisor to leaders and employees, guiding organizational effectiveness, talent development, and workforce performance across Castelion.

This role partners with business leaders to align people strategies with objectives, offering guidance on design, performance management, employee relations, leadership development, and workforce planning in a fast-growing environment.