HR Manager

Responsibilities

• Lead day-to-day HR activities across US operations.
• Implement and maintain HR policies, procedures, and employee documentation.
• Ensure compliance with federal, state, and local employment legislation.
• Maintain employee records and HR systems.
• Support payroll, benefits administration, and employee data management.
• Partner with external providers and advisors when required.
• Lead recruitment activities across operational and professional roles.
• Partner with managers to identify hiring needs and workforce plans.
• Manage onboarding activities and ensure a positive employee experience from day one.
• Build relationships with local recruitment channels, colleges, and community organisations.
• Provide guidance and support on performance, conduct, attendance, grievance, and disciplinary matters.
• Coach managers on people policies and best practices.
• Support performance management and employee development initiatives.
• Help create a positive and high‑performing working environment.
• Champion and embed Manna's culture and ways of working.
• Support employee engagement, wellbeing, and retention initiatives.
• Act as a trusted advisor to managers and employees.
• Promote a positive employee experience throughout the employee lifecycle.
• Work closely with operational leaders to support business objectives.
• Partner with the Director of HR to implement scalable people processes.
• Support organisational growth, change management, and expansion activities.
• Provide HR reporting and recommendations where required.

• 5+ years' experience in an HR Generalist, HR Manager, or People Operations role.
• Strong knowledge of US employment law and HR compliance requirements.
• Experience managing recruitment, onboarding, employee relations, and performance management.
• Excellent communication and stakeholder management skills.
• Strong organisational and problem‑solving abilities.
• Ability to work independently and manage multiple priorities.
• Full US driver's licence with a clean driving record.
• Based in Tulsa, Oklahoma, or able to relocate quickly.
• Experience working within a startup, scale‑up, logistics, aviation, manufacturing, or technology environment.
• Experience building or implementing HR processes in a growing business.
• Strong employee relations and employment law experience.
• Comfortable balancing strategic priorities with day‑to‑day operational delivery.
• Someone who enjoys being visible, approachable, and actively involved in the operation.