Senior Accountant

Get to Know Us

Horizon3.ai 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.

The Opportunity

As a Senior Staff Accountant at Horizon3.ai, you’ll be more than just a numbers person — you’ll be a key contributor to building a high-performing accounting function. You’ll have the opportunity to refine and implement processes, mentor team members, and work closely with accounting leadership to ensure our books are accurate, timely, and insightful.

This role is perfect for someone who has strong technical accounting skills, thrives in fast-moving environments, and enjoys balancing day-to-day execution with process improvement initiatives.

Key Responsibilities

• Month-End Close – Own critical components of the monthly close process, ensuring accuracy, timeliness, and compliance with USGAAP.

• Order-to-Cash – Assist with the review of sales orders, preparation and issuance of customer invoices, and resolution of billing discrepancies to ensure accurate and timely revenue recognition in accordance with contract terms.

• Procure-to-Pay – Support the internal procurement and AP processes by servicing requests, processing vendor invoices, and coordinating timely payment requests in alignment with approval workflows and internal controls.

• General Ledger Management – Prepare and review journal entries, reconciliations, and supporting documentation.

• Process & Systems Improvement – Identify opportunities to streamline workflows, automate tasks, and strengthen internal controls.

• Audit & Compliance – Support annual financial audits and ensure ongoing compliance with accounting standards and company policies.

• Cross-Functional Collaboration – Partner with Finance, Sales, and Operations teams to align financial processes with business needs.

• Mentorship – Provide guidance to junior accounting team members and help develop their technical skills.

What We’re Looking For

• Experience: 5+ years of progressive accounting experience, preferably in SaaS or high-growth tech companies.

• Education: Bachelor’s degree in Accounting, Finance, or related field; CPA strongly preferred.

• Technical Skills: Strong knowledge of USGAAP; experience with revenue recognition; proficiency in accounting software (NetSuite, Sage, QuickBooks, or similar) and advanced Excel/Google Sheets skills.

• Analytical Mindset: Ability to identify and resolve discrepancies, analyze trends, and make process recommendations.

• Ownership Mentality: Proactive, accountable, and able to work with minimal direction in a fast-paced environment.

• Collaboration and Drive: Strong interpersonal and communication skills; ability to work cross-functionally and influence without direct authority.

Perks of Horizon3.ai

• 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.

• Remote Work: We are a 100% remote company. Enjoy the convenience and work-life balance that comes with remote work. 

• Competitive Compensation: We offer competitive salary and benefits which includes health, vision & dental care 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: $109,000 - $180,000. The exact salary will be determined based on the selected candidate’s location, qualifications, experience, and relevant skills.

• Additional compensation: This role may also be eligible for an equity package (in the form of stock options). If any other compensation benefits apply, they will be discussed during the interview process.

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. 

Application Note

In any materials you submit, you may redact or remove age-identifying information such as age, date of birth, or dates of school attendance or graduation. You will not be penalized for redacting or removing this information.