Declan Weir
Go-to-Market Systems and Engineering Leader (he/him)
Notion
ex-StripeBuilder-first, enterprise systems leader with two decades of experience designing and deploying AI-integrated technology backbones across GTM, Operations, and Legal functions.
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Proven track record replacing manual workflows with LLM-powered agentic systems, architecting secure multi-layer AI infrastructure, and connecting disparate SaaS platforms into coherent, scalable operational Deep practitioner of internal AI agent deployment — including designing Know-Act-Learn agentic architectures, multi-layer AI systems (reasoning, data, and UI layers), and cross-functional automation frameworks grounded in Jobs-to-be-Done principles. Consistently eliminates operational fragmentation by making workflows programmable and keeping humans at judgment moments rather than in the Experienced C-suite technology partner who translates complex architectural decisions into business outcomes, drives operational maturity through disciplined data governance and compliance frameworks (SOX, GDPR), and builds high-impact teams with a culture of speed, curiosity, and user-centricity. Experienced in leading build vs buy Close to a decade of experience building/leading engineering teams across the Americas, Europe & Asia. Have adopted and led established teams as well as designing new organizational models from scratch and hiring globally to fulfil the vision. Adept at combining Player-Coach leadership with strategic, visionary thinking. Strong understanding of enterprise-level security controls, with experience ensuring compliance with data protection standards and regulations. Experienced in threat model creation and have designed/redesigned processes and systems to meet GDPR and equivalent compliance Designed and built IT Governance Controls (ITGC), implemented operating models for observability and effectiveness testing for these controls. Well versed in working in SOX-compliant environments as well as bringing rigor, governance and observability to pre-compliant environments to achieve compliance. Led teams successfully through difficult change and have provided clarity when teams focus need to evolve to match the needs of hyper-growth or changing economic conditions. Led multiple team/system migrations after mergers and acquisitions. Establish new team norms and team identities to help absorb the impact on teams whilst improving execution through culture.
GTM Index
- NOTIONJOB
- Head of GTM Systems8M
Head of GTM Systems
Notion
- AFFIRMJOB
- Senior Mgr, Business Systems5M
Senior Manager, Business Systems
Affirm
- STRIPEJOB
- Eng Mgr, GTM Systems4Y 4M
Engineering Manager, GTM Systems
Stripe
- LINKEDINJOB
- Eng Mgr3Y 2M
Engineering Manager
LinkedIn
- Mgr, Sales Systems Eng1Y 3M
Manager, Sales Systems Engineering
LinkedIn
- Salesforce.com Administrat…4Y 5M
Salesforce.com Administrator/Force.com Developer
LinkedIn
- CRITICAL PATHJOB
- Java & GTM Developer3Y 4M
Java & GTM Developer
Critical Path
- Application Support Analyst2Y 5M
Application Support Analyst
Critical Path
- SYMANTECJOB
- Localization Quality Assur…5M
Localization Quality Assurance Engineer
Symantec
- Job: Affirm — Senior Manager, Business Systems · 2025-07 – 2025-12
- Job: Stripe — Engineering Manager, GTM Systems · 2021-03 – 2025-07
- Job: LinkedIn — Manager, Sales Systems Engineering · 2016-09 – 2017-12
- Job: Critical Path — Application Support Analyst · 2006-06 – 2008-11
- Job: Notion — Head of GTM Systems · 2025-12 – present
- Job: LinkedIn — Salesforce.com Administrator/Force.com Developer · 2012-04 – 2016-09
- Job: Symantec — Localization Quality Assurance Engineer · 2004-04 – 2004-09
- Job: LinkedIn — Engineering Manager · 2017-12 – 2021-02
- Job: Critical Path — Java & GTM Developer · 2008-12 – 2012-04
Skills
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Google
Anthropic
Slack
ex-Deloitte India (Offices of the US)