Senior HR Business Relationship Manager (GBS)

NextGig; Województwo mazowieckie; Hybrid; PLN 300,000 - 420,000; Full time

Benefits offered by this job

Life insurance

Private medical care

Employee Assistance Program (EAP)

Lunch card

Volunteering initiatives

Pet-friendly office

Career development plan

Job summary

Mars Global Services in Warsaw, Poland, seeks a Senior HR Business Relationship Manager to drive customer excellence and lead strategic P&O initiatives within a hybrid work model.

The role requires 10+ years in P&O, strong English proficiency, and the ability to act as a bridge between global stakeholders and senior leaders, delivering value through change enablement and strong customer partnerships.

Qualifications

• University degree or equivalent in HR, business, or related field.
• Master’s degree or equivalent combination of education and experience.
• 10+ years of progressive P&O/HR shared services experience.
• Proven P&O partnering across multiple functions (Talent, Rewards, HR operations).
• Fluency in English (written and spoken).

Responsibilities

• PMO lead for transformation and M&A integration projects.
• Drive joint business planning with P&O stakeholders to align services with value.
• Lead Voice of the Customer program to identify gaps and drive improvements.
• Oversee Enterprise People Strategy projects with end-to-end P&O operating model considerations.
• Apply Capture, Escalate, Resolve processes to diagnose and solve recurring issues.

Skills

Stakeholder mastery

Relationship building

Strategic problem solving

Agile project management

P&O expertise & compliance

Digital fluency & change leadership

Education

Bachelor degree in HR/Business

Master’s degree

Job description

Job Description:

Senior HR Business Relationship Manager (f/m/x)

in Mars Global Services

P&O Department

Location: Warsaw

Hybrid working

• Fully virtual recruitment experience

The Senior HR Business Relationship Manager is accountable for driving customer excellence and delivering the MGS P&O and MyP&O service portfolios to key segments and Sr. P&O Business Partners. By serving as a strategic bridge between MGS and senior stakeholders, this role is essential in enabling value creation across the organization through effective change enablement and deep customer partnership. Beyond relationship management, the BRM acts as a PMO lead for segment transformations including M&A Integrations, operationalizing complex changes via MyP&O and the OD Transformation framework to ensure the business captures the full benefits of the MGS P&O strategy.

What would be your key responsibilities?

Strategic Delivery:

• Transformation & M&A Leadership: Serve as the PMO lead for organizational transformations, utilizing the OD Transformation Framework to operationalize service scope, including M&A integration support to seamlessly onboard new business units.
• Enabling Value Creation: Drive joint business planning with global and regional P&O stakeholders to build consistent yet adaptable frameworks that align service delivery with overarching business value.
• Actionable Insights & VOC: Orchestrate the "Voice of the Customer" program to identify service gaps and drive continuous improvement across MGS P&O operations, ensuring high reliability and performance.
• Strategic Project Management: Lead prioritized Enterprise People Strategy projects, providing an end-to-end P&O Operating Model perspective on service expansions and organizational model maturity.
• Escalation & Resolution Architecture: Leverage the "Capture, Escalate, Resolve" process to diagnose recurring issues, building robust systemic solutions that prevent future service outages.

Operational Execution:

• Strategic Engagement & Value Creation: Initiate and lead high-impact customer engagement programs across MGS P&O and MyP&O, fostering deeper connections with internal stakeholders to ensure the service model is consistently enabling value creation at every touchpoint.
• M&A Integration & Transition Advisory: Act as the lead for M&A integration support by providing expert advice to customers on the most effective transition pathways, ensuring newly acquired businesses are integrated smoothly and supported through the appropriate P&O service models.
• Predictive Insights & Solutions: Monitor segment‑specific dashboards to identify potential issues and anticipate organizational trends, proactively deploying MyP&O expertise to provide tailored solutions that address the unique challenges of each business unit.
• Continuous Improvement & Capability: Synthesize business environment insights and customer feedback to drive continuous improvement initiatives, ensuring MyP&O capabilities and operational flows remain aligned with the Five Principles.
• Key Account & Relationship Management: Serve as the primary Key Account Manager for select global customers and P&O heads, interfacing directly with senior leaders to manage sensitive organizational requests and build a unified "One P&O" community.

What are we looking for?

Education & Core Experience:

• Minimum Qualification: University degree or equivalent, preferably in Human Resources, Business Administration, or a related field.
• Preferred Qualification: Master’s degree, or an equivalent combination of advanced education and substantial professional experience.
• Experience Level: 10 or more years of progressive experience within a People & Organization (P&O) / HR shared services environment.
• P&O Business Partnering & Functional Versatility: Proven background as a P&O Business Partner (P&O BP) or a well-rounded blend of expertise across multiple P&O functions (e.g., Talent Acquisition, Total Rewards, Talent Management, Employee Relations, or Operations).
• Language Proficiency: Fluency in English (written and verbal) is required; proficiency in additional languages is beneficial.

Core Competencies & Capabilities:

• Stakeholder & Relationship Mastery: Proven ability to quickly establish rapport and maintain strong, customer-oriented partnerships with a diverse range of global and regional stakeholders.
• Strategic Problem Solving: Expert in diagnosing, isolating, and resolving complex organizational issues by recommending and executing high‑impact…
• Agile Project Management: A results‑driven self‑starter capable…
• P&O Expertise & Compliance: …
• Digital Fluency & …
• Communication & Change Leadership: …

What can you expect from Mars?

• Contract of employment.
• Attractive financial conditions with Business Bonus and Christmas Bonus.
• We will also look after your safety and well-being by offering you rich benefits package including life insurance, private medical care, Employee Assistance Program fully covered by Mars, MultiBenefit Program.
• Lunch card.
• Extra savings scheme to support You in long perspective.
• Support in career building through personalized development plan.
• On-line shop with attractive discounts on our products that Your family and friend are going to love.
• Possibility to participate in volunteering initiatives during working hours.
• A modern and pet friendly office in the City Centre.