Human Resources/Office Manager

Socket.dev; Vienna (VA); On-site; USD 90,000 - 120,000; Full time

Job summary

American Rheinmetall Munitions in Vienna, VA is seeking an experienced HR professional to provide day-to-day HR and office operations support. You will guide employee relations, onboarding, offboarding, recruitment, benefits programs, performance management, and compliance with federal/state/local laws, while maintaining a clean, efficient facility.

This role reports to Expal HR liaison and requires collaboration across cross-cultural teams, strong communication, and the ability to

Qualifications

• Bachelor’s degree in HR or related field or 5+ years HR generalist experience that includes at least a year of project management.
• 5+ years of experience in Human Resources roles with cross-functional team leadership.
• Ability to obtain and maintain a government security clearance (Secret) if required.

Responsibilities

• Serve as principal advisor to company leadership on HR matters and employee relations.
• Align ARM policies with company standards, including employee handbook.
• Administer onboarding, offboarding, personnel changes, and files.
• Coordinate recruitment efforts and strategies to hire and retain talent.
• Ensure compliance with federal, state, and local employment laws and reporting requirements.
• Manage compensation and benefits programs and partner with control group on competitive plans.
• Support performance management tools and provide timely feedback to leaders.
• Provide guidance to Expal HR and oversee daily office operations.

Skills

HR principles

Project management

Effective communication

Cross-cultural collaboration

HR software

Education

Bachelor’s degree in HR or related field

5+ years HR generalist experience

Tools

HR software systems

Job description

About American Rheinmetall Munitions

American Rheinmetall Munitions, Inc.* is headquartered in Vienna, Virginia, with production facilities in Camden, AR, Texarkana, TX, and Windham, ME. The company is part of Rheinmetall’s Weapon and Ammunition division and has been leveraging the division’s global product portfolio and pursuing new product design for the U.S. market for decades. Rheinmetall specializes in large and medium caliber ammunition families and is a world leader in the fields of long-range artillery, propellant technologies and powders, mortars, infantry systems, and medium and large caliber armaments. By combining deep U.S.-based engineering, manufacturing, and program management expertise with Rheinmetall’s global portfolio of advanced munitions technologies, American Rheinmetall Munitions provides the U.S. Department of War with expanded access to precision extended-range, and multi-domain lethality solutions for battlefield dominance. This unique fusion enables rapid adaption of proven technologies to U.S. requirements, accelerates the fielding of next-gen capabilities, and strengthens the U.S. defense industrial base through domestic production and strategic partnerships. American Rheinmetall Munitions’ product portfolio further includes protection systems for vehicle survivability, munitions demilitarization, as well as load, pack, assembly, and full rate production capabilities.

SUMMARY

This role provides flexible, day‑to‑day support across all Human Resources and office operations for American Rheinmetall Munitions (ARM.) The position is responsible for handling a wide range of HR and office management tasks as they arise, ensuring compliance with legal and regulatory requirements, applying established best practices, and keeping daily operations running smoothly. The role adapts to immediate needs, assists employees and managers with routine HR matters, and maintains an organized, efficient office environment.

Position is located in Vienna, VA with American Rheinmetall Munitions

ESSENTIAL FUNCTIONS

• Serve as the principal advisor to company leadership on all human resource matters; utilizing American Rheinmetall Human Resources or legal guidance when required. This will include employee relations topics.
• Align ARM policies, forms, and human resources practices with American Rheinmetall; including the employee handbook.
• Administer daily HR activities including onboarding, offboarding, employment changes, and personnel files.
• Coordinate recruitment efforts, develop and implement strategies to recruit, hire and retain qualified talent.
• Ensure that company programs comply with federal, state and local employment laws, regulations and reporting requirements.
• Ensure the company’s compensation program is equitable and competitive, and represent the company’s interests to the control group in the creation and administration of competitive and equitable benefit programs.
• Implement and utilize the established performance management tools to assist company leadership in providing timely, objective feedback to employees regarding their performance.
• Provide guidance and support to the Rheinmetall Expal Munitions, S.A.U. (Expal) Human Resources.
• Oversee daily office operations to ensure a clean, organized, and safe work environment.
• Coordinate office supplies, vendor relationships, maintenance requests, and facility needs.
• Manage front‑office responsibilities including reception, visitor management, and mail distribution.
• Support leadership and employees with administrative tasks, meeting coordination, travel, and events.
• Act as the primary point of contact for building services, security, and external vendors.
• Organize company meetings, on‑site events, recognition activities, and basic communications.
• Respond quickly to changing priorities and manage urgent operational needs as they arise.
• Provide assistance across multiple functional areas (HR, facilities, safety, administrative support).
• Step into tasks outside typical HR responsibilities to ensure smooth daily operations.

SUPERVISORY RESPONSIBILITY

Mentorship to Expal HR.

MINIMUM QUALIFICATIONS

Education

• Bachelor’s degree in human resources, Business Administration, or a related field OR 5 years’ Human Resources generalist experience that includes at least a year of project management.

Experience

• 5+ years of experience in Human Resources roles.
• Proven track record of successfully implementing HR initiatives and managing cross-functional teams.
• 2+ years in a government contracting environment, defense or aerospace is preferred.

Knowledge, Skills and Abilities (as demonstrated through experience, training and/or testing)

• Knowledge of HR principles, practices, and regulations.
• Proficiency in project management methodologies and tools.
• Ability to communicate effectively both orally and in writing to internal and external stakeholders at all levels.
• Ability to collaborate effectively with cross-cultural teams.
• Analytical skills to interpret HR data and develop actionable insights.
• Ability to manage multiple projects simultaneously and meet deadlines.
• Familiarity with HR software and systems.
• Problem-solving skills and a proactive approach to addressing challenges.
• Ability to obtain and maintain a government security clearance (Secret) if required.

Background Prerequisites

Must undergo and meet company standards for background check, employment verification, reference checks, and controlled substance testing.

WORKING CONDITIONS AND PHYSICAL DEMANDS

With or without reasonable accommodations, requires the physical and mental capacity to perform effectively all essential functions. In addition to other demands, the demands of the job include:

• Ability to work under pressure and meet deadlines.
• Primarily office-based work with occasional travel
• Extensive keyboarding
• Ability to work effectively via teleconference