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Accounting Operations Specialist

San Diego, CA

What we do:
Halcyon is the industry’s first dedicated, adaptive security platform that combines multiple proprietary advanced prevention engines along with AI models focused specifically on stopping ransomware.

Who we are:
Halcyon was formed in 2021 by a team of cyber industry veterans after battling the scourge of ransomware (and advanced threats) for years at some of the largest global security vendors. Comprised of leaders from Cylance (now Blackberry), Accuvant (now Optiv), Fireye and ISS X-Force (now IBM), Halcyon is focused on building products and solutions for mid-market and enterprise customers.

As a remote-native, completely distributed global team, we recognize great talent can exist anywhere. We invite you to apply to a job you’re interested in and we'll work a plan to meet your needs.

We’re looking for an Accounting Operations Specialist to join our Finance team. Reporting directly to our VP of Accounting, Jackie Fenn, this role will own the full Accounts Receivable and Accounts Payable cycles—including invoicing, collections, vendor payments, reimbursements, and cash flow forecasting. You’ll also oversee tax compliance in Avalara and play a key role in strengthening accounting operations as Halcyon scales.

What You’ll Do

  • Take full ownership of AR & AP cycles.

  • Review contracts in Salesforce/ERP; generate accurate invoices and manage collections.

  • Oversee sales tax compliance via Avalara (all registrations current).

  • Process ~200 vendor bills/month via Bill.com; prepare timely vendor payments.

  • Review Expensify employee expense reports; process reimbursements.

  • Forecast weekly cash collections/payments; communicate expected flows to the team.

  • Reconcile daily cash activity to ERP and partner with the Senior Accountant to resolve discrepancies.

  • Support annual audit preparation and participate in ad-hoc accounting projects.

What We’re Looking For

  • 3+ years in Accounts Payable, Accounts Receivable, or general accounting.

  • Degree in Accounting or equivalent experience.

  • Hands-on experience with Bill.com, Salesforce, Avalara, Rillet, and Expensify strongly preferred.

  • Detail-oriented with strong organizational skills and ability to manage volume.

  • Strong communicator who can partner across Finance, Sales, and external vendors/customers.

 Compensation Range

  • $75,000 – $95,000 annually

In accordance with applicable state and federal laws, the range provided is Halcyon’s reasonable estimate of the base compensation for this role. The actual amount may differ based on non-discriminatory factors such as experience, knowledge, skills, abilities, and location. Base pay is one part of the total package that is provided to compensate and recognize employees for their work, and this role may be eligible for additional discretionary bonuses/incentives, and equity in the Company.

We understand it takes a diverse team of highly intelligent, passionate, curious, and creative people to develop the exceptional product we are building. Our dynamic team has incredible perspectives to share, just as we know you do, and we take great pride in being an equal opportunity employer.

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