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Mars UK • MEX-Queretaro-Queretaro | BRA-Sao Paulo-Guararema | Mexico

Senior Portfolio Manager (People & Operations)

Employment type:  Full time
9.2

/10

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Job Description

Job Description:

Senior Portfolio Manager (People & Operations) | hybrid | Querétaro and/or Guararema

Step into the role of Senior Portfolio Manager with Mars Global Services (MGS), specifically in our People & Organization (P&O / Human Resources) division at Mars Inc. This position offers the opportunity to partner with various business units to develop and implement strategic plans. You’ll manage a diverse portfolio of Human Resource-related projects, each designed to shape the experiences of our Associates and contribute to their success at Mars. By aligning these projects with our organizational goals, you’ll play a key role in monitoring performance and leading the planning, scheduling, and reporting of portfolio-related activities.

As a Senior Portfolio Manager, you will be at the forefront of navigating organizational complexity, balancing the needs and priorities of multiple stakeholders, and providing thought leadership to drive innovation and best practices across the P&O portfolio.

What are we looking for?

Certifications: A Portfolio Management Professional (PfMP), Management of Portfolio (MoP), or similar certification would be highly advantageous.

Education: A bachelor’s degree is required.

Experience: We’re seeking someone with at least 7-10 years of experience in Portfolio Management, Program Director, or Transformation Director roles, ideally with a proven track record of managing complex portfolios.

Professional Skills: The ideal candidate will possess the following skills:

  • Exceptional analytical and quantitative skills, with the ability to interpret complex data and drive informed decision-making.

  • Deep expertise in project and portfolio management methodologies, ensuring consistent application of best practices.

  • Proficiency in project management tools and software, with a preference for experience using ServiceNow.

  • Outstanding communication and interpersonal skills, capable of engaging effectively with stakeholders at all organizational levels.

  • Proven leadership abilities, including team development, motivation, and management in matrixed environments.

  • Skilled in delivering compelling presentations and facilitating productive meetings that drive alignment and action.

  • Adept at building and maintaining strong relationships with senior executives and cross-functional partners.

  • Demonstrated capability to operate strategically and tactically within complex, matrixed organizations to achieve results.

  • Solid understanding of financial management principles, including budgeting, forecasting, and benefits realization.

  • Advanced competence in managing organizational complexity, including handling interdependencies, ambiguity, and competing priorities.

  • Expertise in stakeholder management, with a track record of balancing diverse interests, resolving conflicts, and fostering collaboration.

  • Thought leadership mindset, with the ability to influence strategic direction and promote continuous improvement and innovation.

What will be your key responsibilities?


Portfolio Management: Develop and implement strategic integrated plans for managing a diverse portfolio of projects, ensuring alignment with organizational objectives and adaptability to changing business needs.

Managing Complexity: Lead the orchestration of multiple, concurrent projects with varying degrees of complexity, interdependence, and risk profiles. Apply systems thinking to anticipate challenges, resolve issues, and ensure seamless execution across the portfolio.

Demand Intake: Conduct thorough analysis and evaluation of proposed P&O projects, prioritizing initiatives based on strategic value, resource availability, and risk assessment.

Stakeholder Management: Influence stakeholder attitudes, decisions, and actions for mutual benefit. Proactively engage with senior leaders, business partners, and cross-functional teams to understand their needs, manage expectations, and ensure alignment.

Risk Management: Identify, monitor, and manage risks across the P&O portfolio, developing mitigation strategies and contingency plans to ensure successful delivery.

Centre of Excellence Alignment: Form strong relationships with the Center of Excellence, ensuring adherence to governance, standards, and best practices across all Mars Global Services portfolios.

Resource Allocation & Budget Management: Advise on effective P&O resource allocations across projects to optimize performance and efficiency, while maintaining budgetary discipline and maximizing return on investment.

Reporting and Documentation: Prepare and present detailed reports and insights on P&O portfolio performance, leveraging data-driven analysis to inform strategic decisions and drive continuous improvement.

Thought Leadership: Champion innovative approaches, industry best practices, and emerging trends in portfolio management. Mentor and develop team members, fostering a culture of excellence, agility, and high performance.

What can you expect from Mars?

Work with diverse and talented Associates, all guided by the Five Principles.
Join a purpose-driven company, where we’re striving to build the world we want tomorrow, today.
A strong focus on learning and development support from day one, including access to our in-house Mars University.

#hybrid

Company benefits

Open to part-time employees
Open to job sharing
Open to compressed hours
Sabbaticals
Enhanced maternity leave – 26 weeks at 90% pay
Enhanced paternity leave – 26 weeks at 90% pay
24 days annual leave + bank holidays
“Pawternity” leave
Pregnancy loss leave
Bank holiday swaps
Shared parental leave
Adoption leave
Family health insurance
Pregnancy support
Neo-natal leave
Faith rooms
Meditation space
Dog friendly office
Dog friendly co-working space
Annual bonus
Employee discounts
Cinema discounts
Referral bonus
Joining bonus
Cycle to work scheme
Electric Car Salary Sacrifice
Enhanced pension match/contribution
Theme park discounts
Lunch and learns
In house training
LinkedIn learning license
Studying sabbaticals
Open to part time work for some roles

Working at Mars UK

Company employees:

4,000 In the UK

Gender diversity (m:f):

57:43

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Flexa awards 2025
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Diversity and Inclusion

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Consumer Goods

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Industry awards 2023
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