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Interim Leadership

I provide senior interim and fractional leadership across supply chain, planning, IBP/S&OP and technology-enabled transformation.

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I typically engage where organisations are facing complexity, change, underperformance or loss of momentum — situations that require experience, judgement and hands-on leadership, not learning on the job.

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My role is to step in quickly, establish control, and lead delivery, while building capability within the organisation so improvements are sustained after I leave.

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This interim leadership work is often complemented by IBP consulting support and longer-term capability building and training.

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Experienced Interim Leadership when delivery matters

When Organisations Engage Me

I am typically brought in when:

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  • Planning or execution performance is unstable or deteriorating

  • IBP / S&OP exists on paper but is not driving decisions

  • A transformation or programme has stalled or lost credibility

  • There is a gap in senior leadership capability

  • Technology or ERP programmes are under pressure

  • Teams need clarity, structure and confidence

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These situations often combine process, organisation, behaviour and technology challenges, which need to be addressed together.

Typical Interim Roles

I have operated in a range of senior interim roles, including:

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  • Interim IBP / S&OP Lead

  • Interim Head of Planning

  • Interim Supply Chain Director

  • Interim Programme or Transformation Lead

  • Interim ERP / Digital Planning Programme Manager

  • Fractional planning or transformation leadership roles

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Engagements range from short-term stabilisation assignments through to longer, multi-phase transformation roles.

Selected Interim Leadership Engagements

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GSK - Programme Manager, IBP/S&OP Transformationm

Global pharmaceutical organisation

Led an IBP maturity assessment and multi-dimensional gap analysis across demand, supply and S&OP. Established governance routines, planning standards, RACI and RAID discipline across workstreams. Coached and mentored planning leaders to improve review effectiveness, scenario planning and decision-making quality. Supported readiness for digital planning tool deployment and clarified boundaries between process, people and technology.

Flamingo Horticulture - Head of Planning

Private equity owned business

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Engaged to design and deploy S&OP and S&OE processes into a fast-moving, PE-owned environment. Designed end-to-end processes, advised on organisational structure, and improved how the ERP system was used to support planning. Trained, coached and mentored teams, facilitated cross-functional workshops, and supported wider supply chain improvement initiatives.

Tulip Flowers
Vaccine Production Line

AstraZeneca - Planning Lead, Vaccines

Global vaccines organisation

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Led and developed planning teams across the UK, Sweden and USA during a period of organisational change. Focused on creating the right environment for teams to support internal and external suppliers, maintain continuity of supply and operate effectively in a complex global network.

Arm - SAP Project Manager

Technology enabled supply chain transformation

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Programme leadership for SAP GTS upgrade and wider supply chain transformation. Established governance cadence, reporting, RAID management and cross-functional coordination. Managed vendor engagement, supported design, build and test phases, and strengthened programme controls, documentation standards and stakeholder alignment in a lean environment.

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How I work as an Interim Leader

My approach is pragmatic and delivery-focused:

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  • I diagnose quickly and prioritise what really matters

  • I establish clear governance, roles and decision-making structures

  • I work hands-on with teams rather than operating as an external advisor

  • I engage confidently at executive and board level

  • I focus on building capability alongside delivery

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I am comfortable operating in ambiguity and under pressure, and I bring calm structure to complex situations.

What clients value

Clients consistently value my ability to:

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  • Stabilise underperforming functions or programmes

  • Improve the quality and pace of decision-making

  • Create clarity across roles, processes and accountabilities

  • Rebuild confidence within teams

  • Bridge the gap between strategy, process and execution

Outcomes clients typically see

  • Improved planning and execution performance

  • Clearer governance and accountability

  • Reduced firefighting and escalation

  • Stronger cross-functional alignment

  • Sustainable ways of working embedded within the organisation

Let's talk

If you need experienced interim leadership to stabilise delivery, lead change or support a critical transition, I’m happy to have an initial confidential conversation to understand your situation and assess whether I’m the right fit.

© 2026 by Carter MacKenzie. 

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