Why Castelion, Why Now

Castelion is moving incredibly fast to develop and deliver advanced defense systems at a time when execution matters more than ever. We believe focus, ownership, and excellence are decisive advantages - and we're building a world-class team to turn bold ideas into real capability.

This is a rare opportunity to join at an early stage, where you'll have significant ownership, collaborate with exceptional teammates, and make a direct, measurable impact on our mission and the future of the company - regardless of your function.

Human Resources Manager

We are seeking a Human Resources Manager responsible for launching and supporting people operations of a new manufacturing facility during a period of rapid growth. This role is highly operational and partners directly with leadership to build a high-performing workforce, establish a strong employee culture, and ensure exceptional execution of day-to-day HR operations.

Responsibilities

Site Leadership Partnership

Partner with leadership to execute workforce strategies that support production goals, organizational growth, and operational excellence.
Coach and develop leaders to improve manager effectiveness, accountability, employee performance, and engagement.
Provide data-driven HR guidance by identifying workforce trends, risks, and opportunities that improve business outcomes.

Employee Relations & Performance Management

Lead complex employee relations matters and performance management activities, ensuring timely, consistent, and legally compliant resolutions.
Strengthen manager capability through coaching on investigations, corrective actions, conflict resolution, and employee development.
Foster a high-performance culture by driving accountability, consistent policy application, and proactive resolution of workplace issues.

Non-Exempt Workforce Support

Serve as the HR expert for a large non-exempt manufacturing workforce, ensuring compliance with wage and hour laws, attendance, scheduling, and timekeeping practices.
Analyze workforce metrics, including turnover, attendance, overtime, and engagement, to identify trends and implement operational improvements.
Partner with leaders to proactively resolve workforce challenges that could impact productivity, staffing or employee retention.

Site Growth & Operations

Support rapid site expansion by partnering with leaders to achieve hiring, onboarding, and workforce readiness objectives.
Coordinate HR support for organizational growth, new production lines, shift expansions, and workforce changes while maintaining a consistent employee experience.
Ensure company HR programs and initiatives are executed effectively and consistently across the Rio Rancho site.

HR Operations

Execute core HR programs, including performance reviews, compensation, promotions, employee development, and policy administration with accuracy and timeliness.
Partner cross-functionally with Payroll, Benefits and Talent Acquisition to deliver exceptional employee support and operational efficiency.
Utilize workforce data and HR metrics to identify opportunities for continuous improvement and inform business decisions.

Compliance & Risk Management

Ensure compliance with federal, New Mexico, and company employment requirements while minimizing organizational risk.
Lead audits, investigations, documentation, and regulatory activities with accuracy, consistency, and timely execution.
Partner with leaders and Environmental Health & Safety to proactively address workplace risks and maintain a compliant, safe work environment.

Basic Qualifications

Bachelor's degree in Human Resources, Business, or related field.
6+ years of progressive Human Resources experience.
3+ years supporting manufacturing, production, distribution, or other operational environments with significant non-exempt populations.
Strong experience coaching managers through employee relations, investigations, corrective actions, and performance management.
Deep understanding of wage and hour laws affecting hourly employees.