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Mark43 is hiring its first dedicated Tax Manager to own direct and indirect tax compliance and strategy across U.S., U.K., and Canadian entities. This is a high-impact individual contributor role at a venture-backed company building software for first responders and government agencies.
You will be the internal owner of all tax filings, payments, and tax positions the company takes. You will manage third-party tax advisors as an extension of your team rather than a substitute for internal ownership. Beyond ensuring compliance, you will actively identify and implement strategies to reduce tax exposure and cash tax cost, and build scalable processes designed to withstand audit and support IPO readiness.
Key responsibilities include:
**Tax Compliance & Reporting:**
- Own U.S. federal and state income tax compliance in partnership with external advisors, including tax attribute tracking and international reporting for foreign subsidiaries
- Own U.S. sales and use tax, including collection, remittance, exemption certificate management for government agency customers, and nexus monitoring
- Lead the design and rollout of a multi-state use tax apportionment approach for software purchases to reduce sales tax cost
- Own corporation tax, VAT, GST/HST, and statutory filings for U.K. and Canadian subsidiaries
- Manage transfer pricing framework for cost-plus entities, including intercompany agreements and documentation
- Prepare or review quarterly and annual ASC 740 tax provision and support external audit on tax matters
**Strategic & Operational:**
- Own Open Book Data reporting on a major U.K. public-sector contract, including periodic reporting to the customer, responding to inquiries, and leading audits (this contract is governed by U.K. government requirements for full visibility into costs, pricing, and margins)
- Identify opportunities to reduce tax exposure and cash tax cost; advise leadership on tax implications of new contracts, jurisdictions, and acquisitions
- Manage third-party tax advisors and build scalable, well-documented processes and controls
The role requires someone who can balance compliance rigor with proactive tax planning, and who thrives in a fast-growing, multi-jurisdictional environment.
**Requirements:**
- CPA or equivalent tax credential (required)
- 7+ years of tax experience, including at least 3 years in a corporate tax role
- Experience managing multi-jurisdictional tax compliance (U.S., U.K., Canada preferred)
- Strong knowledge of U.S. federal and state income tax, sales and use tax, and international tax principles
- Experience with transfer pricing and ASC 740 tax provision accounting
- Experience in a venture-backed or pre-IPO company
- Familiarity with government and tax-exempt customer bases (preferred)
- Must be authorized to work in the country of hire; visa sponsorship not available
