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Mars

Change Manager - Ecosystem Effectiveness

Salary:  $108,160 – $148,720 per annum
Location:  USA-Illinois-Chicago | United States of America
Location flexibility:  1 office day / week, 2 office days / week, 3 office days / week, 4 office days / week
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Job Description

Job Description:

**This role does not support Visa Sponsorship**

The Change Manager, Ecosystem Effectiveness supports the design, delivery, and adoption of strategic ecosystem initiatives that require new ways of working across functions, teams, and partners. Working under the direction of the Strategic Director, the role helps translate change strategies into practical actions, stakeholder engagement approaches, interventions, and implementation activities that enable successful adoption and sustained business outcomes.

What are we looking for?

Minimum qualifications:

  • Bachelor's degree
  • 6+ years of experience in change management, organizational effectiveness, transformation, strategy execution, internal consulting, employee experience, stakeholder engagement, or related fields.
  • Experience supporting cross-functional programs or initiatives in a matrixed organization.
  • Demonstrated ability to manage multiple stakeholders and build productive working relationships.
  • Experience coordinating and executing initiatives from planning through implementation.
  • Experience developing communications, engagement plans, workshop materials, presentations, and adoption activities.
  • Ability to operate effectively in ambiguous environments while maintaining strong execution and follow-through.
  • Experience designing or implementing creative engagement approaches, collaborative experiences, or innovative ways of driving adoption is valued.

Preferred qualifications:

  • Master's degree.
  • Change Management certification or related professional training.

What will be your key responsibilities?

Change Enablement & Adoption

  • Support the design and execution of change strategies for strategic ecosystem initiatives and transformation programs.
  • Develop and implement stakeholder engagement, communication, and adoption plans that increase awareness, understanding, commitment, and action.
  • Identify adoption risks, barriers, and opportunities and recommend practical mitigation actions.
  • Monitor and assess change readiness, stakeholder sentiment, and adoption progress throughout program delivery.

Stakeholder Engagement & Relationship Management

  • Build strong relationships across R&D, Commercial, Supply, Sustainability, Digital, and external partners.
  • Partner with stakeholders to understand needs, concerns, dependencies, and potential impacts of change initiatives.
  • Facilitate workshops, working sessions, and engagement activities that promote alignment and collaboration.
  • Act as a trusted partner to initiative leaders, helping navigate stakeholder dynamics and organizational complexity.

Intervention Design & Ways of Working

  • Design and coordinate interventions that support behavioral change, team effectiveness, collaboration, and organizational adoption.
  • Help identify and implement creative, innovative, and practical approaches to change that move beyond traditional communication and training tactics.
  • Support the development of tools, resources, and experiences that enable individuals and teams to successfully adopt new ways of working.
  • Capture lessons learned and continuously improve approaches to change and adoption.

Program Execution & Delivery

  • Translate strategic direction into detailed actions, plans, deliverables, and follow-through activities.
  • Coordinate activities across multiple stakeholders and workstreams to ensure timely execution.
  • Track actions, dependencies, milestones, decisions, and risks associated with change initiatives.
  • Prepare concise updates, presentations, materials, and insights for leadership and stakeholder discussions.

Measurement & Insights

  • Support the development and tracking of ecosystem effectiveness, adoption, engagement, and organizational health indicators.
  • Gather and analyze qualitative and quantitative feedback to inform change strategies and interventions.
  • Develop reports, summaries, and insights that help leaders understand progress and areas requiring additional focus.

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.
  • An industry competitive salary and benefits package, including company bonus.

The base pay range for this position at commencement of employment is between the range listed below, however, base pay offered may vary depending on multiple individualized factors, including but not limited to job-related knowledge, skills, and experience. The total compensation package for this position will include variable pay, medical and dental benefits, participation in 401k plan, and paid time off benefits. Details of participation in these benefit plans will be provided if an applicant receives an offer of employment.

The pay range shown is applicable to all US locations listed within the job posting:USD 108,160.00 - USD 148,720.00

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Working at Mars

Hybrid

Core hours 11–3

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
Neonatal 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
Learning license
Studying sabbaticals
Open to part time work for some roles
Menopause support
On-site gym
On-site barista
Secure on-site parking
On-site catering
Private booths
On-site wellness room
Collaboration spaces

Awards & Accreditations

1st - Most Family Friendly Company

1st - Most Family Friendly Company

Flexa awards 2026
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Most loved - Large companies

Top 5 - Most loved - Large companies

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Best Work-Life Balance

Top 10 - Best Work-Life Balance

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1st - Most Family Friendly Company

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2nd – Pet Friendly

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Top 5 - Most Flexible Company

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Top 5 - Most Inclusive Company

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Best Work-Life Balance

Top 10 - Best Work-Life Balance

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Best Career Progression

Top 10 - Best Career Progression

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Best Workplace Culture

Best Workplace Culture

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Best Workplace Benefits

Best Workplace Benefits

Flexa awards 2025
1st – Large companies

1st – Large companies

Flexa100 2024
Consumer Goods

Consumer Goods

Industry awards 2023
3rd – Large companies

3rd – Large companies

Flexa100 2023
Retail & Ecommerce

Retail & Ecommerce

Industry awards 2022
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