Nonprofit Interim Leadership & Advisory
Steady Leadership.
Stronger Organizations.
Lasting Impact.
Interim executive leadership and targeted advisory services helping nonprofit organizations navigate transition with clarity, confidence, and purpose.
Who We Serve
Porta-Sloane Advisory helps nonprofit boards and executive leadership teams navigate organizational change, through embedded interim executive leadership and targeted strategic advisory support.
We work with organizations facing leadership transitions, restructuring, and operational challenges, with a focus on governance, operational clarity, financial controls, stakeholder trust, and sustainable impact.
Key Services
Support for every stage of change
Embedded interim leadership or targeted advisory support, shaped around what your organization needs now.
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Interim Leadership & Turnaround
Embedded interim leadership that provides continuity during executive transitions and steadies organizations, programs, and teams that need to change course.
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Strategy, Governance & Board Advisory
Support for boards and leadership teams to set direction, strengthen governance, and measure what matters.
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Funder Relations & Resource Development
Strengthening relationships with donors, funders, and government partners, and building the capacity to deliver new services.
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Financial & Operational Governance
Practical financial and project management that gives leadership and the board a reliable view of the organization's position.
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Workplace Culture & Labor Advisory
Experienced support with union negotiations and sensitive staff matters, handled fairly and with care for the workplace.
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When to Engage Us
What’s keeping your boardup at night?
You don’t have to navigate it alone.
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Leadership transitions
An executive vacancy or planned departure needs steady leadership while the board plans its next hire.
About the Founder
Zandi Zungu, MBA
Porta-Sloane Advisory was founded by Zandi Zungu, whose experience spans nonprofit environments in the United States and the United Kingdom.
Zandi works alongside boards and leadership teams to bring steady, embedded leadership and practical advisory support to organizations in transition, with a focus on governance, operational clarity, and sustainable impact.
More About Porta-SloaneOur Approach
A clear path through transition
Every engagement is customized, but the work follows a consistent, transparent arc.
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Discover
Understand mission, pressures, stakeholders, and leadership needs.
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Assess
Review governance, operating practices, financial stewardship, and risks.
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Align
Agree on priorities, scope, accountability, and success measures.
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Execute
Provide agreed interim leadership and/or targeted advisory support.
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Transition
Document progress, transfer knowledge, and support sustainable next steps.
Why Porta-Sloane
Experienced, steady, and mission-focused
Nonprofit focus
Our work is dedicated to nonprofit boards and leadership teams and the realities of mission-driven organizations.
US and UK experience
Founder experience spans nonprofit environments in both the United States and the United Kingdom.
Empathetic and analytical
Steady, people-centred leadership paired with a clear-eyed view of governance, operations, and finances.
Facing a leadership transition or a period of change?
Schedule a confidential conversation about your organization's current needs and how interim leadership or targeted advisory support could help.
Schedule a Consultation