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Christine M. Castro

B2B Cybersecurity CMO / VP of Marketing / GTM Strategist. Open to full-time marketing leadership at pre-IPO cybersecurity companies.

Two decades building marketing engines from zero at B2B cybersecurity companies, Seed through Series C. Deep domain fluency in identity threat intelligence, dark web monitoring, endpoint breach prevention, IAM, and SaaS security, across commercial, enterprise, and U.S. and international public sector markets. Turns category ambiguity into market leadership by unifying demand generation, product marketing, brand and content into a single go-to-market engine that plans and reports against overall company ARR, not siloed marketing quotas.

The numbers

$4.2MBudget managed, Series B IAM
2 to 20Team built, US / EMEA / APAC
3xARR YoY, marketing sourced
4.5xSQLs passed to sales
750K to 4M+Endpoints in 18 months
21% to 73%Marketing-influenced pipeline
1,112%ROI, inaugural conference
36xPipeline to spend, agentic SDR pilot

Stage and domain

  • Stage: Seed through Series C, venture and PE-backed, plus one pre-IPO growth stage. Marketing built from zero in four of the last six roles.
  • Domains: identity threat intelligence and dark web monitoring, IAM and passwordless authentication, endpoint detection and breach prevention, network security and advanced threat detection, SaaS and data access security, agentic AI SecOps, digital risk protection, infostealer and fraud intelligence.
  • Segments: commercial, enterprise, U.S. federal and law enforcement, financial services, insurance, and international including EMEA and the Middle East.

Leadership scope

  • Full marketing function ownership: demand generation, product marketing, brand, content, web, SEO and AEO, field and events, marketing operations.
  • Multi-million dollar budgets with full channel activation, scoped backward from the company ARR target.
  • Teams built from the ground up across two continents, including BDR organizations.
  • Quarterly board and investor reporting tied to ARR, not to marketing-only metrics.
  • Cross-functional partnership with sales, product and customer success as peer functions.

What I am looking for

  • CMO, VP or SVP of Marketing, full-time, at a pre-IPO cybersecurity company.
  • Marketing reporting to the CEO, as a peer of sales.
  • A mandate to build or rebuild the GTM motion, not to maintain it.
  • Remote or hybrid. Based in Beverly, Massachusetts, with regular travel expected and a long track record of leading distributed teams across time zones.

Career summary

  • Christine Castro, Fractional CMO & GTM Advisor, Aug 2023 to present. Formerly C Squared CMO.
  • Constella Intelligence, Vice President, Marketing, Oct 2025 to Jun 2026.
  • COGNNA, Fractional Vice President, Marketing, Apr 2024 to Aug 2025.
  • DoControl, Vice President, Marketing, Feb 2023 to Aug 2023.
  • DuskRise, Vice President, Global Marketing, Feb 2022 to Oct 2022.
  • HYPR, Vice President, Marketing, Nov 2019 to Feb 2022.
  • Morphisec, Director, Global Marketing, Mar 2018 to Oct 2019.
  • ZeeVee, Director, Marketing, Sep 2015 to Dec 2017.
  • Studio M Productions, Founder and Strategist, Feb 2003 to Aug 2015.

Full role detail, metrics and earlier history are in the complete resume, available on request below. The career section on the homepage covers the same timeline.

Request the full resume

The complete document goes out by email, usually the same day. Tell me a little about the role and I can tell you honestly whether it is a fit.

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Prefer email? christine@christinecastro.com. Or book a conversation and skip the document entirely.