Strategic HR Business Partner for High-Growth Tech

Castelion Corporation; Torrance (CA); Hybrid; USD 90,000 - 120,000; Full time

Job summary

Castelion is seeking a Human Resources Business Partner (HRBP) to act as a strategic advisor to leaders and employees. You will guide organizational design, performance management, employee relations, leadership development, and workforce planning in a fast-growing defense systems environment.

The role emphasizes ownership, collaboration, and measurable impact on Castelion's mission and growth. The ideal candidate brings 5+ years of HRBP experience with technical or manufacturing organizations,

Qualifications

• 5+ years of HR experience with HRBP support for technical/engineering/manufacturing/ops teams.
• Experience supporting exempt and non-exempt populations in fast-paced settings.
• Knowledge of employment law, HR best practices, and policy compliance.
• Ability to influence without authority and build organizational credibility.
• Strong analytical skills and ability to translate people data into business insights.

Responsibilities

• Partner with business leaders to align people strategies with business goals and improve workforce effectiveness.
• Coach leaders through performance management, employee relations investigations, and policy guidance.
• Lead workforce planning, succession, and talent development initiatives to support critical roles.
• Drive organizational design initiatives to support growth and operational efficiency.
• Develop and implement strategic people programs and governance across Castelion.

Skills

HRBP experience

change management

employee relations

performance management

organizational design

data analysis

Education

Master's degree in HR or related field

Job description

Castelion is seeking a Human Resources Business Partner (HRBP) to act as a strategic advisor to leaders and employees. You will guide organizational design, performance management, employee relations, leadership development, and workforce planning in a fast-growing defense systems environment.

The role emphasizes ownership, collaboration, and measurable impact on Castelion's mission and growth. The ideal candidate brings 5+ years of HRBP experience with technical or manufacturing organizations,