S2P Invoice Processing (non-VIM) SME f/m/x

Mars; Poland; Hybrid; PLN 180,000 - 280,000; Full time

Benefits offered by this job

Life insurance

Employee Assistance Program

Private medical care

MultiBenefit Program

Lunch card

Volunteering opportunities

Job summary

Mars in Warsaw is seeking an experienced S2P Invoice Processing (Non-VIM) SME to design and implement future-fit invoice processing solutions across markets. You will drive global standardization while addressing regional needs and work with international stakeholders, Digital Transformation teams, Finance Operations, Tax, and S2P experts.

This role sits in a dynamic project environment, requiring adaptability, strong communication, and ability to navigate ambiguity.

Qualifications

• Minimum 5 years of experience in Invoice Processing, Accounts Payable, P2P, or related finance operations.
• Experience in international environments with cross-functional stakeholders.
• Knowledge of SAP ERP and SAP Ariba, OneSource, and VIM workflows.
• Experience with transformation programs and large-scale change projects.
• Fluent English and degree in Finance, Procurement, or related field.

Responsibilities

• Identify key business scenarios across non-VIM invoice processing landscapes.
• Support global design sessions and process validation.
• Contribute to PoCs and future-state process development.
• Ensure documentation aligns with designs and testing readiness.
• Collaborate with Finance, Tax, Digital Transformation and Shared Service teams.
• Manage deliverables to agreed timelines and escalate risks.

Skills

Invoice processing

Stakeholder management

Project delivery

Change management

Education

University degree in Finance or related field

Tools

SAP

SAP Ariba

VIM

OneSource

Job description

Job Description:

S2P Invoice Processing (non-VIM) SME f/m/x

Location: Warsaw

Hybrid working

* Fully virtual recruitment experience *

Are you an experienced Invoice Processing professional who enjoys driving change rather than operating established processes? This is a unique opportunity to become part of Mars’ Digital Core Program, helping shape the future global Invoice-to-Pay landscape across multiple markets and business segments.

As an S2P Invoice Processing (Non-VIM) SME, you will play a key role in designing and implementing future‑fit invoice processing solutions, ensuring global standardization while addressing regional and segment‑specific needs. Working closely with international stakeholders, Digital Transformation teams, Finance Operations, Tax, and Source‑to‑Pay experts, you will contribute to large‑scale system and process transformation initiatives that will impact Mars globally.

This is a highly dynamic project environment where adaptability, stakeholder management, and the ability to navigate ambiguity are essential.

What would be your key responsibilities?

Process Design & Transformation

• Use your invoice processing expertise and Mars network to identify key business scenarios across the non-VIM invoice processing landscape.
• Contribute to the design and evolution of global non-VIM invoice processing processes and support detailed business workshops.
• Participate in global design sessions, solution reviews, and process validation activities.
• Support key design decisions and help shape the future operating model.
• Contribute to Proof of Concepts (PoCs) and future‑state process development.
• Ensure process documentation is accurate, complete, and aligned with agreed designs.
• Identify and support testing scenarios and test execution activities.

Change & Deployment Support

• Conduct change impact assessments and provide input into training needs analysis.
• Support global and regional deployments of invoice processing solutions.
• Help ensure business readiness across markets and segments.
• Collaborate with data teams to ensure data accuracy and relevance across Invoice-to-Pay processes.

Country Validation & Stakeholder Engagement

• Participate in country validation activities to ensure the global template supports local business and regulatory requirements.
• Work closely with stakeholders across Finance, Procurement, Tax, Digital Transformation, and Shared Service teams.
• Ensure documentation, change impacts, and design decisions reflect country validation outcomes.

Project Delivery

• Manage assigned deliverables according to agreed timelines and quality standards.
• Proactively identify risks, challenges, and dependencies, escalating where appropriate.
• Support continuous alignment between project activities and existing business operations.

What are we looking for?

• Minimum 5 years of experience in Invoice Processing, Accounts Payable, P2P, S2P, or related Finance Operations processes within an international environment.
• Strong understanding of invoice processing tools, standards, controls, and end‑to‑end processes.
• Working knowledge of ERP (ideally SAP, not necessarily S/4)
• Good exposure to P2P and connected technologies like SAP Ariba, OneSource and workflow technologies like VIM required.
• Experience working in transformation programs, process improvement initiatives, or large‑scale business change projects.
• Ability to work independently while effectively collaborating with cross‑functional and global teams.
• Strong stakeholder management and communication skills.
• Demonstrated ability to manage ambiguity, adapt quickly, and solve complex process challenges.
• University degree in Finance, Procurement, Supply Chain, Business, or related field.
• Good exposure to P2P and connected technologies like SAP Ariba, SAP, OneSource and workflow technologies like VIM required. Knowledge of e‑Invoicing regulations and their impact on Invoice-to-Pay processes.
• Exposure to digital technologies, automation, RPA, and AI‑enabled process solutions.
• Fluent English

What can you expect from Mars?

• Permanent contract of employment as from the start.
• Attractive financial conditions including Bonuses.
• We will also look after your safety and well‑being by offering you rich benefits package including life insurance, Employee Assistance Program fully covered by Mars, and private medical care, MultiBenefit Program and 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 Center (Zlote Tarasy building).