Senior HR Business Relationship Manager (GBS)

Mars; Województwo mazowieckie; Hybrid; PLN 240,000 - 320,000; Full time

Benefits offered by this job

Life insurance

Private medical care

Employee Assistance Program

Job summary

Mars Global Services–P&O in Warsaw seeks a Senior HR Business Relationship Manager to drive customer excellence and deliver service portfolios across key segments. Hybrid work and a rich benefits package are offered to support strategic change initiatives and transformation programs.

The role partners with senior stakeholders, leads PMO activities for transformations and M&A, and ensures the MyP&O framework delivers tangible business value through effective change management.

Qualifications

• University degree or equivalent in HR, Business Administration or related field.
• 10+ years of progressive P&O/HR shared services experience.
• Proven P&O Business Partnering or cross-functional HR expertise.
• Fluency in English (written and spoken); other languages a plus.]
• Experience leading transformations and PMO activities, including M&A integrations.

Responsibilities

• Strategic Delivery: lead PMO for transformations and M&A integrations with the OD Transformation framework.
• Enabling Value Creation: drive joint business planning with P&O stakeholders to align service delivery with business value.
• Actionable Insights & VOC: manage Voice of the Customer programs to identify gaps and improve service.
• Strategic Project Management: oversee Enterprise People Strategy projects and P&O operating model enhancements.
• Operational Execution: engage stakeholders across MGS P&O and MyP&O to ensure value creation at touchpoints.
• M&A Integration: advise on transitions and integrate acquired units into P&O service models.
• Stakeholder Management: maintain strong senior-level partnerships and drive the One P&O initiative.

Skills

Stakeholder management

Strategic thinking

Agile project mgmt

P&O knowledge

Digital fluency

Change leadership

English fluency

Education

Bachelor's/human resources or business

Master's degree

Tools

MS Office

HRIS systems

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 resolution strategies.
• Agile Project Management: A results-driven self-starter capable of independently managing multiple high-priority projects and transformations in a fast-paced, evolving environment.
• P&O Expertise & Compliance: Demonstrates broad knowledge of HR regulations, policies, and contemporary practices, ensuring all initiatives are technically sound, consistent, and compliant.
• Digital Fluency & Value Creation: IT-savvy with a keen interest in leveraging technology and system functionality to drive standardization and unlock business value.
• Communication & Change Leadership: Strong oral and written communication skills with an adaptive mindset that proactively leads change and champions new ways of working.

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.