Senior Customer Onboarding Engineer

Horizon3; Chicago, Northern (IL, KY); Hybrid; USD 126,000 - 140,000; Full time

Benefits offered by this job

Health insurance

Equity opportunities

Hybrid & remote work

Generous vacation policy

Parental leave

Job summary

Horizon3 is seeking a Senior Customer Onboarding Engineer to own a customer’s first 30 days, from sales handoff to production deployment of NodeZero. You’ll work across cloud, Linux, networking, and security in a time-boxed onboarding with opportunities to mentor and influence broader support activities.

Ideal candidates have 5+ years in enterprise environments, strong Linux and container tooling, and a passion for securing critical infrastructure.

Qualifications

• Bachelor’s degree in Computer Science, Information Technology, Engineering, or related field, or equivalent professional experience.
• 5+ years in technical support, systems administration, cloud operations, implementation, or similar enterprise role.
• Background in cybersecurity, including threat detection, vulnerability management, encryption standards, and compliance frameworks such as SOC 2 or GDPR.
• Strong Linux administration in production: configuration, performance tuning, hardening, and troubleshooting.
• Hands-on Docker and containerization experience, including building, deploying, and managing applications in orchestrated environments (Kubernetes or similar).
• Solid working knowledge of AWS, Azure, or GCP and IaC tools such as Terraform, Ansible, or CloudFormation.
• In-depth networking fundamentals: TCP/IP, firewalls, VPNs, load balancers, and tools such as Wireshark and tcpdump.
• Basic scripting in Bash, Python, or PowerShell for automation, diagnostics, and workflow support.
• Demonstrated self-learning: labs, certifications (e.g., AWS Solutions Architect, Linux+), personal projects, or open-source work.
• Experience comparable to a junior cloud administrator in an enterprise setting: multi-tenant environments, resource allocation, and compliance requirements.
• Familiarity with identity management: RBAC, SSO (OAuth, SAML), and directory services (Active Directory, LDAP).
• Basic database literacy: relational vs. schemaless stores, schema, querying, and light administration.
• Ability to run a customer-facing technical engagement to a 30-day finish line with minimal supervision.
• Preferred: API integration, Datadog observability, managed databases like Amazon RDS, onboarding/professional services experience.

Responsibilities

• Own the onboarding: lead kickoff, confirm scope, environments, owners, identity path, compliance, go-live criteria.
• Project-manage the 30-day plan; track blockers and escalations.
• Provide best practices and deployment/optimization of the customer environment.
• Ensure successful production deployment against initial testing goals as onboarding success criteria.
• Diagnose and resolve failures across cloud, networking, and security for onboarding.
• Perform root-cause analysis for first-time integration issues to prevent recurrence.
• Work in Linux production environments: configuration, performance tuning, security hardening, troubleshooting.
• Deploy and manage Docker/containerized workloads with Kubernetes.
• Provision and troubleshoot cloud environments (AWS, Azure, GCP).
• Assist in troubleshooting network issues (TCP/IP, firewalls, VPNs, load balancers).
• Configure identity paths: RBAC, SSO, directory services (AD, LDAP).
• Collaborate with CS, Engineering, Product, Sales to unblock onboarding issues and drive improvements.

Skills

Linux admin

Docker

Kubernetes

Cloud ops

Networking basics

Scripting

Education

Bachelor's degree or equivalent

Tools

AWS

Azure

GCP

Terraform

Ansible

CloudFormation

Datadog

Job description

At Horizon3, we’re building a team of bold thinkers, problem solvers, and Learn-it-Alls.
We’re looking for individuals who:

Love solving tough problems, especially the ones no one else has cracked.

Thrive in high-performing teams that celebrate success and lift each other up.

Have the grit and tenacity to take on complex, mission-critical challenges.

Want to make a real impact by helping organizations stay ahead of attackers.

Continuously learn and adapt, embracing new technologies, perspectives, and ideas.

Are passionate about disruption, driving innovation in the cybersecurity space.

If you’re eager to grow, driven to contribute, and ready to shape the future of cybersecurity, we want to hear from you.

The Perks of working with Horizon3

Our Culture

We’re a team of “learn-it-alls” who love building awesome products. From intern to CEO, we celebrate diversity and bring a wide array of experience from technology startups, Fortune 500s, and the US Military.

Remote Work Options

With offices in San Francisco, Chicago, and Amsterdam, we have hybrid and remote positions available globally.

Build Something Meaningful

We’re motivated to create a safer, more secure environment, convert new ideas to exceptional solutions and deliver great customer experiences.

Be part of a passionate and talented team which have entrepreneurial spirit, because it makes a huge difference.

Think Long Term

You’ll have complete ownership and responsibility along with huge potential for growth. We envision the future and build it one step at a time.

Competitive pay, great health & dental care for you and your loved ones, and a 4 weeks + generous holidays and vacation packages globally.

Positions

We’re a remote-first company with teammates clustered around the globe.

Senior Customer Onboarding Engineer

Location

US, Remote

Employment Type

Full time

Location Type

Remote

Department

Customer

Get to Know Us

Horizon3 is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find and fix and verify exploitable attack vectors before criminals exploit them. Our flagship product, the NodeZeroTM platform, delivers production-safe autonomous pentests and other key assessment operations that scale across the largest internal, external, cloud, and hybrid cloud environments. NodeZero has been adopted by organizations of all sizes, from small educational institutions to government agencies and Global 100 enterprises. It is used by ITOps/SecOps teams, consulting pentesters, and MSSPs and MSPs.

We are a fusion of former U.S. Special Operations cyber operators, startup engineers, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common security problems: ineffective security tools, false positives resulting in alert fatigue, blind spots, “checkbox” security culture, cybersecurity skills shortage, and the long lead time and expense of hiring outside consultants. Collectively, we are a team of learn it alls, committed to a culture of respect, collaboration, ownership, and results.

Role summary

We are hiring a Customer Onboarding Engineer with 5+ years of hands‑on enterprise experience. You will be the technical owner of a new customer’s first 30 days: taking the account from sales handoff to successful production deployment of the NodeZero platform.

This role requires the same technical depth as a Senior Technical Support Engineer—cloud, Linux, networking, containers, identity, and security—but the primary work is time‑boxed implementation for new customer onboarding. You will still diagnose hard problems, do root‑cause analysis, and write the knowledge that Support needs. When bandwidth allows, you will assist the larger Horizon3 support team with standard support case management and resolution.

You should be a self‑directed engineer who can juggle multiple enterprise engagements with little supervision, working cross functionality with key internal and customer stakeholders to successfully deploy the NodeZero platform and ensure realized customer value.

What you will do

Own the onboarding

Lead kickoff with the customer and internal account team. Confirm scope, environments, owners, identity/access path, compliance constraints, and go‑live criteria.

Project‑manage the 30‑day plan. Track blockers (credentials, firewall changes, IdP claims, change windows).

Provide best practices expertise and assist in deployment and optimization of the customer environment.

Ensure successful production deployment against the customers initial testing goals as success criteria for the onboarding.

Technical Implementation

Diagnose and resolve implementation failures across cloud infrastructure, networking, and security with the same rigor used on escalated support tickets.

Perform root‑cause analysis on first‑time integration and deployment issues so the same failure does not recur after handoff.

Work in Linux production environments: server configuration, performance tuning, security hardening, and troubleshooting.

Deploy and manage containerized workloads with Docker and orchestrated environments such as Kubernetes.

Provision and troubleshoot pentest configuration AWS, Azure, or GCP.

Assist in troubleshooting network issues that commonly block go‑live: TCP/IP, firewalls, VPNs, load balancers, etc.

Configure and validate identity paths required for onboarding: RBAC, SSO (OAuth, SAML), and directory services (Active Directory, LDAP).

Apply NodeZero expertise in scoping and configuring initial tests.

Work across the company

Collaborate with CS, Engineering, Product, and Sales to unblock implementation issues that are bigger than a single customer.

Advocate for customer specific changes or product improvements as required.

Mentor junior onboarding or support engineers on first‑time deployment patterns.

Stay current on cloud, container, and security practices

Required qualifications

Bachelor’s degree in Computer Science, Information Technology, Engineering, or a related field, or equivalent professional experience.

5+ years in technical support, systems administration, cloud operations, implementation, or a similar enterprise role, ideally supporting large‑scale or Fortune 500 deployments.

Background in cybersecurity, including threat detection, vulnerability management, encryption standards, and compliance frameworks such as SOC 2 or GDPR.

Strong Linux administration in production: configuration, performance tuning, hardening, and troubleshooting.

Hands‑on Docker and containerization experience, including building, deploying, and managing applications in orchestrated environments (Kubernetes or similar).

Solid working knowledge of AWS, Azure, or GCP and IaC tools such as Terraform, Ansible, or CloudFormation.

In‑depth networking fundamentals: TCP/IP, firewalls, VPNs, load balancers, and tools such as Wireshark and tcpdump.

Basic scripting in Bash, Python, or PowerShell for automation, diagnostics, and workflow support.

Demonstrated self‑learning: labs, certifications (for example AWS Solutions Architect, Linux+, or equivalent), personal projects, or open‑source work.

Experience comparable to a junior cloud administrator in an enterprise setting: multi‑tenant environments, resource allocation, and compliance requirements.

Familiarity with identity management: RBAC, SSO (OAuth, SAML), and directory services (Active Directory, LDAP).

Basic database literacy: relational vs. schemaless stores, schema, querying, and light administration.

Ability to run a customer‑facing technical engagement to a 30‑day finish line with minimal supervision.

Preferred qualifications

Proven experience integrating and troubleshooting APIs, including REST services, authentication mechanisms, and API‑driven automations in enterprise applications.

Familiarity with observability tools such as Datadog for monitoring, logging, and alerting in distributed systems.

Basic experience with managed databases such as Amazon RDS: setup, backups, scaling, and query optimization.

Prior onboarding, professional services, or TAM work with a defined time‑to‑go‑live.

Experience creating reusable assets: validation scripts, Terraform modules, Datadog dashboard/alert packs, and customer‑ready runbooks.

Success measures

On‑time go‑live rate within the 30‑day window

Customer confirmation that core workflows are implemented and able to be run independently

Reduction in hours for the next similar onboarding through scripts, templates, and playbooks

Perks of Horizon3

Inclusive Team: We value diversity and promote an inclusive culture where everyone can thrive.

Growth Opportunities: Be part of a dynamic and growing team with numerous career development opportunities.

Innovative Culture: Work in a collaborative environment that encourages creativity and out‑of‑the‑box thinking.

Hybrid & Remote Work: We embrace a mix of remote and hybrid work models depending on role and location, including our Chicago office, where some roles require regular in‑office presence.

Competitive Compensation: We offer competitive salary, equity and benefits. Our benefits include health, vision & dental insurance for you and your family, a flexible vacation policy, and generous parental leave.

Compensation and Values

At Horizon3, we believe that our people are our greatest asset, and our compensation philosophy reflects this core value. We are committed to fostering an environment where all employees feel valued, respected, and rewarded for their contributions. Our compensation structure is designed to be fair, competitive, and transparent, ensuring that every team member is recognized and compensated equitably across roles, levels, and locations.

In accordance with various State’s transparency regulations, we provide the following salary range information for this position:

Base salary range: $126,000 - 140,000 annually. The exact salary will be determined based on the selected candidate’s location, qualifications, experience, and relevant skills.

Additional compensation: All full‑time roles are eligible for an equity package in the form of stock options.

You Belong Here

Horizon3 is not just an equal opportunity employer - we are a community that values diversity, equity, and inclusion as fundamental principles of our culture and success. We are dedicated to fostering a workplace where everyone feels welcome and respected, regardless of race, color, religion, sex, national origin, age, disability, veteran status, sexual orientation, gender identity or expression, genetic information, marital status, hair length or any other legally protected status by law.

Our commitment to diversity and inclusion means we strive to attract, develop, and retain a workforce that reflects the varied communities we serve. We believe that diverse perspectives drive innovation and strengthen our ability to create cutting‑edge cybersecurity solutions. At Horizon3, every team member is valued and supported in an environment that encourages personal and professional growth.

We welcome candidates from all backgrounds and experiences, and we encourage all qualified individuals to apply. Come be a part of Horizon3, where your unique contributions are recognized, and your potential is limitless.

Other Duties

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee. Duties, responsibilities, and activities may change at any time with or without notice.

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