Lifecycle & Retention Marketing Strategist (Klaviyo/SMS) — Part-Time Contract, 30 hrs/wk

Common Thread Collective (CTC) is a DTC-focused growth agency, and we're looking for an experienced Lifecycle & Retention (email/SMS) Strategist to join our team on a contract basis, roughly 30 hours per week. Email and SMS are cornerstone channels for the ecommerce brands we work with. You'll own the day-to-day execution of lifecycle programs for an assigned set of client accounts: building automation flows, running segmentation strategy, writing campaign copy, managing A/B tests, and keeping deliverability and QA airtight. You'll work closely with our internal Growth Strategy, Paid Media, and Creative teams and report performance directly to clients. This is hands-on execution work for someone who already knows Klaviyo inside and out and wants steady, ongoing contract hours with a DTC agency. Scope of Work Build and manage Klaviyo (and SMS platform) automation flows, from strategy through implementation Develop and execute audience segmentation using behavioral, demographic, and transactional data Write email/SMS campaign copy and manage the campaign calendar Set up and analyze A/B/split tests to continuously improve performance Maintain QA processes across all live campaigns and flows Monitor deliverability metrics and sender reputation; troubleshoot issues as they arise Manage compliant opt-in/opt-out flows and consent preferences (CAN-SPAM, TCPA, CASL, GDPR, CCPA) Produce monthly performance reporting with key metrics, insights, and recommendations Identify and flag list growth and revenue opportunities within assigned accounts Requirements 2–4+ years of hands-on email and SMS marketing experience in a DTC/ecommerce environment Expert-level Klaviyo proficiency: automation flow design, custom event tracking, ecommerce API integrations, behavioral segmentation, custom metrics Experience with at least one SMS platform (Attentive, Postscript, or Klaviyo SMS), including compliance and subscriber segmentation Working knowledge of email deliverability fundamentals (DKIM, SPF, DMARC) and sender reputation monitoring Familiarity with email/SMS compliance regulations (CAN-SPAM, TCPA, CASL, GDPR, CCPA) Comfort with A/B testing methodology for email and SMS Strong written communication for both campaign copy and client-facing reporting Bonus: working knowledge of a second ESP (Attentive, Emarsys, Iterable, Braze), Figma for email design collaboration, or basic HTML/CSS for template edits Able to reliably commit ~30 hours/week during standard business hours (overlap with US time zones required) Skills / Tags Klaviyo, Email Marketing, SMS Marketing, Marketing Automation, Ecommerce, Attentive, Postscript, Segmentation, A/B Testing, Email Deliverability, Copywriting, DTC Marketing