HR Global Mobility and Rewards Administrator

Harbor; United States; Hybrid; USD 40,160 - 60,241; Full time

Job summary

Harbor is seeking an HR Global Mobility and Rewards Administrator to join our growing team. This hybrid role supports international assignments, share plan administration, payroll, tax, and compliance with guidance from the Global Mobility Lead and Global Reward Manager.

We welcome graduates or candidates with some administrative experience who want to build technical expertise across mobility and employee rewards. Nantwich, England-based office, with remote work capability.

Qualifications

• No prior mobility or share plan experience needed; full training provided.
• Interest in international work and employee rewards.
• Strong administrative and organisational skills with attention to detail.
• Comfort with numbers and data; analytical mindset.
• Experience using Microsoft Excel and case management systems.
• Excellent written and verbal communication.
• Ability to manage multiple cases and deadlines.
• Ability to build relationships with clients and stakeholders.
• Familiarity with equity compensation or share plans.
• Experience with HR, payroll, or reward-related systems.
• Proactive and adaptable in a fast-paced environment.

Responsibilities

• Coordinate and administer international assignments and share plans.
• Liaise between employees, HR, payroll, finance, and providers.
• Ensure steps of assignments meet agreed timescales.
• Administer share plans using a dedicated platform (training provided).
• Support cyclical reward events and reporting.
• Maintain accurate case records and status reports.
• Respond to employee queries professionally.
• Monitor service delivery and escalate issues.
• Review supplier invoices against budgets.
• Explain processes and services clearly to client employees.

Skills

Administrative skills

Excel

Data analysis

Attention to detail

Communication skills

Payroll basics

HR systems

Equity compensation

Tools

Microsoft Excel

Case management systems

Job description

HR Global Mobility and Rewards Administrator

UK - Hybrid

Harbor is seeking a HR Global Mobility and Rewards Administrator to join our growing team. Global mobility sits at the intersection of payroll, tax, social security and immigration; share plan and reward administration sits alongside it, connecting equity compensation, payroll and compliance. Together they offer a fascinating, fast-moving foundation for a career in reward and international working. The role is admin-focused day to day, but it isn't process‑for‑the‑sake‑of‑it: you'll need to understand why things are done, not just how. Working closely with and supported by our Global Mobility Lead and Global Reward Manager, who own the technical and advisory side, you'll coordinate the moving parts of our clients' international assignments and share plan activities, steadily building your own knowledge of the technical detail — including the tax, equity and compliance elements — over time.

This is a great opportunity for someone at the start of their career — a graduate, or someone with some administrative experience — who wants to build genuine technical expertise across two connected areas: international mobility and employee share plans. We're looking for someone to grow with us. This is a hybrid position that offers remote work capability, with our office located in Nantwich, England.

Key responsibilities

• Coordination and administration
• Acting as a key liaison between employees, client HR, payroll, finance, and our external providers and service partners — including share plan administrators and professional services firms
• Coordinating the administrative steps of international assignments to agreed timescales
• Administering employee share plans using a dedicated share management platform (full training provided)
• Supporting the planning and execution of cyclical reward events, ensuring all activities are delivered accurately and within established timelines
• Maintaining accurate case records and documentation across assignments, share plans and reward programmes, and producing regular status reports
• Serving as a point of contact for clients, responding to and resolving ad hoc employee queries clearly, accurately and professionally
• Monitoring service delivery and deadlines, proactively identifying and escalating issues that may impact delivery
• Checking supplier invoices against agreed services and budgets, and flagging discrepancies for approval
• Explaining our processes and services to client employees clearly and accurately

Data and reporting

• Performing data analysis, validation and manipulation using Microsoft Excel to support mobility, reward, and reporting requirements
  Improvement and growth
• Identifying opportunities to improve processes, service efficiency, and operational effectiveness
• Building knowledge of the technical side of the role — cross-border tax, social security, compliance, and equity compensation — with the support of the Global Mobility Lead and Global Reward Manager

Skills and experience

• No prior mobility or share plan experience needed — full training and support provided
• A genuine interest in how international working and employee reward operate, and appetite to learn the technical detail over time
• Strong administrative and organisational skills with excellent attention to detail — a meticulous, structured, systematic approach
• Comfort with numbers, data and detail; an analytical, curious mindset
• Experience using Microsoft Excel, including data manipulation and analysis; competent with Microsoft Office and case management systems
• Excellent written and verbal communication skills
• Ability to manage multiple cases and priorities effectively and work to strict deadlines
• Strong problem‑solving skills and a customer‑focused approach, delivered with a professional, calm demeanour
• Ability to build effective relationships with clients, colleagues and external stakeholders
• Experience in employee reward, compensation, benefits, or share plan administration
• Experience working with HR, payroll, or reward‑related systems
• Familiarity with equity compensation or employee share schemes
• Highly organised and detail‑oriented
• Able to see the bigger picture: understands why a task matters and how it connects to the wider assignment, share plan cycle and client relationship, rather than working in isolation
• Proactive and adaptable in a fast‑paced environment
• Professional and confident when interacting with clients and stakeholders
• Able to work independently while contributing effectively as part of a team

Harbor is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, ethnicity, color, religion, sex, sexual orientation, gender identity, marital status, civil union status, national origin, ancestry, age, parental status, disabled status, veteran status, or any other legally protected classification, in accordance with applicable law.