Senior Engineering Manager, MSP/MSSP

The role

Lead and grow the MSP/MSSP engineering team at Horizon3. You will drive the platform features that let partners deliver NodeZero as a managed service to their customers at scale.

What you will do

• Build, mentor and grow a team of backend and full-stack engineers focused on multi-tenant partner capabilities.
• Drive platform strategy for MSP and MSSP use cases, including multi-tenancy, parent and sub-client relationships, partner administration and white-labeling.
• Establish and evolve architecture for account hierarchies, delegated administration, tenant isolation and partner entitlement and licensing flows.
• Use design reviews, code reviews and blameless retrospectives to build a culture of quality and engineering excellence.
• Partner with Product, Customer Success, Partnerships and Sales to align the team's roadmap with partner needs.
• Balance partner support and operational needs with the platform improvement roadmap.
• Hire and directly manage software engineers focused on multi-tenant and partner platform systems.
• Recruit, onboard, mentor, coach, develop, recognize and retain team members, and lead horizontally with peer managers and senior leaders.

Required qualifications

• Demonstrated experience leading engineering teams building and operating multi-tenant SaaS platforms at scale.
• Strong technical background in multi-tenancy, account hierarchies, tenant isolation, delegated administration and parent/sub-client models.
• Experience with partner or channel software models such as MSP, MSSP, OEM, white-label, reseller or co-branded platforms.
• Proven track record of taking complex platform capabilities from design through production and at-scale operation.
• Strong working knowledge of at least one major cloud provider (AWS, GCP or Azure).
• Experience with identity and access management, RBAC, authorization models and enterprise account structures.
• Experience driving architecture decisions through design reviews, RFCs or similar frameworks, particularly for multi-tenant or partner-facing systems.
• Able to write clear, durable process documentation that engineering teams can adopt.
• Comfortable with modern backend languages such as Python or Go, and able to engage in technical discussions and code reviews.
• Proven ability to hire, develop and retain high-performing engineers in remote or distributed environments.
• Strong communication skills across technical and non-technical audiences.
• Demonstrated ability to balance strategic roadmap delivery against partner support and operational needs.

Nice to have

• Background in cybersecurity or security platforms.
• Experience with third-party risk management or compliance-adjacent capabilities.
• Familiarity with licensing, entitlements, subscription management or billing integrations.
• AWS experience.

Benefits

• Health, vision and dental insurance for you and your family.
• Flexible vacation policy.
• Generous parental leave.
• Equity package in the form of stock options.
• Growth and career development opportunities.
• Collaborative, innovative culture.
• Hybrid and remote work options.

Before you apply

• Some roles, including those in the Chicago office, require regular in-office presence.
• Up to 10% business travel may be required.

About the company

Horizon3 is a fast-growing, remote cybersecurity company. Its NodeZero platform provides production-safe autonomous pentests used by IT Ops, SecOps teams, consulting pentesters, MSSPs and MSPs.