Tamer S.

Experience

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  CoreMetric Advisors

  Principal Consultant

  May 2026 - Present

  CoreMetric Advisors provides fractional CFO and FP&A advisory services for SaaS companies ($5M–$40M ARR), focusing on financial reporting, modeling, fundraising readiness, and GTM finance.

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  Auctane

  Vice President Finance

  May 2023 - May 2025

  Auctane is a shipping and software company that provides an ecosystem of ecommerce shipping solutions (ShipStation, ShipEngine, Stamps.com, ShippingEasy, Metapack, etc.) trusted by millions of merchants globally.

  • Led financial reporting, FP&A and GTM finance for a global eCommerce SaaS leader, enabling data-driven decisions across product, sales, and marketing.
  • Restructured Deal Desk and pricing strategy, improving gross margin by 3% and driving $10M+ in annual EBITDA gains.
  • Developed and implemented a unified financial planning framework, improving forecast accuracy by 25% and enabling faster strategic pivots.
  • Partnered with the C-suite to guide capital allocation, M&A evaluation, and operational analytics for revenue growth initiatives.
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  Amazon Web Services (AWS)

  Sr. Finance Manager- Sales, Marketing & Support - FP&A

  Jul 2019 - Mar 2023

  Amazon is a global technology company and marketplace providing e-commerce, cloud computing (AWS), and digital services to consumers and businesses worldwide.

  • Directed strategic and financial planning for global sales verticals, managing multi-billion-dollar P&Ls across public sector and enterprise markets.
  • Designed segmentation and coverage models that boosted sales productivity by 1.5% and improved visibility into cost drivers.
  • Built an analytics platform for engineering and competitive intelligence, shortening reporting cycles by 15 days and enabling real-time KPI tracking.
  • Led cross-functional GTM initiatives that supported $2B in annual revenue growth while reducing operational overhead by 5%.
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  Amazon Web Services (AWS)

  Finance Manager - Infrastructure Operations

  May 2016 - Jun 2019

  • Served as primary finance partner for AWS’s largest data center region, overseeing $300M+ in annual Opex and capital investments.
  • Delivered double-digit percentage cost savings via vendor contract optimization, energy efficiency initiatives, and operational planning.
  • Led strategic financial analysis for global security operations, ensuring compliance, risk mitigation, and financial controls.
  • Partnered with engineering and technical leaders to develop investment business cases balancing growth and profitability.
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  VALTIM MARKETING SOLUTIONS

  Vice President of Finance

  Jan 2015 - Jan 2016

  Valtim is a marketing logistics provider specializing in personalized direct mail, scalable digital printing, 3PL, contact center operations, and marketing automation for clients across sectors.

  • Directed corporate finance strategy and execution for a multi-line marketing services company, driving profitability across four business units.
  • Led end-to-end CapEx and OpEx budgeting and implemented zero-based budgeting, reducing overhead costs by 7%.
  • Developed sales forecasting models that increased forecast accuracy by 16% and improved inventory and resource planning.
  • Managed financial evaluation of M&A opportunities—DCF, FCF, and multiples analyses—guiding Board-level growth decisions.
  • Partnered with the CEO to deliver multi-year strategic growth and value-creation plans.
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  VALTIM MARKETING SOLUTIONS

  Financial Controller

  Jan 2012 - Jan 2015

  • Oversaw accounting operations, ensuring GAAP compliance and corporate governance for multi-million-dollar operations.
  • Introduced cost-allocation models that improved margin visibility and guided pricing for key client contracts.
  • Led system and process automation initiatives, shortening month-end close by 10 days and improving KPI tracking for executive reporting.