SimSpace serves as an AI Proving Ground where organizations can confidently train, test, and outmaneuver adversaries in any environment. Trusted by allied governments, militaries, enterprises, and research institutions worldwide, SimSpace enables adaptive, AI-ready defenses that stay ahead of evolving threats. Founded in 2015 by experts from U.S. Cyber Command and MIT Lincoln Laboratory, the platform unifies training, testing, and validation in a realistic, live-fire simulation—helping teams evaluate security investments, optimize performance, and compress cyber readiness cycles from months to days.

Why join SimSpace? We are an organization that is focused on building our culture and mindfully enhancing our atmosphere every day which is why we have collaborated on an integral value system. Our governing philosophy of being Human Centered is deeply embedded within our value system. We apply this philosophy to every one of our internal team members, external clients, and their customers.

How Do We Work? We believe that people are at the center of everything we do. SimSpace fosters a culture of continuous learning, curiosity, and professional growth. That belief shows up in action: in-house training, internal and external learning platforms, cyber conferences, industry events, and dedicated time for skill development. Our people are empowered to shape their careers - and it shows. Year over year, SimSpace consistently outperforms industry benchmarks in internal mobility, promotions, and total rewards growth.

Who Thrives Here? We are a team of innovators, protectors, and problem-solvers. We believe diversity of thought and experience fuels better solutions, and we’re committed to building teams that reflect the communities we serve. Whether you’re remote or office-based, you’ll collaborate with talented colleagues across departments and time zones, united by the mission to create a safer digital world.

We invite you to apply today!

We are looking for a detail-oriented Senior Accountant – Revenue & Accounts Receivable to join our Finance & Accounting team at SimSpace. Reporting to the Controller, this role will own the day-to-day revenue accounting and accounts receivable functions while supporting the monthly close and financial reporting processes.

The ideal candidate has strong experience with customer billing, revenue recognition under ASC 606, collections, and general ledger accounting. This role works closely with Sales, Customer Success, and Sales Operations to ensure accurate billing, timely cash collections, and compliance with U.S. GAAP in a fast-growing SaaS environment.

What will you be doing as a Senior Accountant – Revenue & Accounts Receivable?

Revenue Accounting

• Prepare and maintain revenue recognition schedules in accordance with ASC 606.

• Record monthly revenue recognition and deferred revenue journal entries.

• Review customer contracts to determine appropriate revenue treatment.

• Reconcile deferred revenue, contract assets, and other revenue-related balance sheet accounts.

• Partner with Sales and Customer Success to ensure customer contracts are accurately reflected in the ERP system.

• Support month-end and year-end close activities related to revenue accounting.

Accounts Receivable & Customer Billing

• Own the end-to-end customer billing process, ensuring invoices are accurate and issued timely.

• Maintain customer accounts and resolve billing discrepancies.

• Monitor accounts receivable aging and proactively manage collections.

• Communicate with customers regarding outstanding invoices and payment status.

• Research and resolve customer payment issues in partnership with Sales and Customer Success.

• Apply customer payments and reconcile customer account balances.

• Prepare bad debt reserve analyses and recommend write-offs when appropriate.

• Monitor customer credit risk and escalate collection issues as necessary.

General Accounting

• Prepare journal entries and maintain accurate accounting records within NetSuite.

• Perform balance sheet account reconciliations.

• Assist with treasury activities, including daily cash monitoring, application and reconciliations.

• Support accounts payable activities as needed.

• Track fixed assets and prepare depreciation entries.

• Support internal, external, and tax audits by preparing schedules and responding to audit requests.

• Identify opportunities to improve billing, collections, and accounting processes while maintaining strong internal controls.

What are the qualifications to apply?

• Bachelor's degree in Accounting, Finance, or related field preferred or commensurate experience.

• 5+ years of progressive accounting experience, with significant experience in accounts receivable and revenue accounting.

• Strong knowledge of customer billing, accounts receivable, collections, and revenue recognition.

• Experience applying ASC 606 and U.S. GAAP, preferably within a SaaS or software company.

• Experience managing deferred revenue schedules and revenue reconciliations.

• Experience with customer invoicing and contract-based billing.

• Experience with ERP systems, NetSuite preferred.

• Advanced Microsoft Excel skills, including PivotTables, XLOOKUP, SUMIFS, and data analysis.

• Excellent analytical, organizational, and problem-solving skills.

• Strong attention to detail and commitment to accuracy.

• Ability to communicate effectively with customers and internal stakeholders across Sales, Customer Success, and Finance.

• Ability to prioritize multiple deadlines and work independently in a fast-paced environment.

• System implementation or improvement experience.

We’re proud to offer a competitive and comprehensive package designed to support your well-being, growth, and success:

• Compensation. Base salary range: $85,000 - $125,000 reflecting our confidence in your expertise and impact, with the opportunity for bonuses tied to company performance and individual contributions.

• Health & Wellness. Comprehensive medical, dental, and vision benefits, plus savings plans—coverage starts on day one!

• Mental Health Support. Access to company-paid counseling, coaching, and resources for you and your family through Spring Health.

• Financial Well-Being. Plan for your future with a 401(k)-retirement savings plan featuring a company match.

• Flexible Time Off. Take the time you need with unlimited vacation and dedicated health & wellness days. SimSpace provides flexible solutions to meet the diverse work-life needs of team members.

• Parental Leave. Paid leave plans to support you and your loved ones during life’s most important moments.

• Ownership Opportunities. Equity stock options at hire, with annual performance-based grants—become an invested stakeholder in our shared success.

• Referral Rewards. Earn $1,500–$3,500 for every qualified hire through our employee referral program.

• Peloton Interactive Wellness Program. Full- and partial- subsidized membership plans and equipment discounts to help you reach your personalized fitness goals.

• Continuous Learning. Access a LinkedIn Learning membership to prioritize your personal and professional development.

• Social Connections. Monthly reimbursements for meaningful connections with teammates through our SocialSpace Community.

• Extra Perks. Legal plan coverage, pet insurance, wellness reimbursements, and more to simplify life’s details.

Join SimSpace and enjoy benefits that enhance your career, health, and happiness!

SimSpace is an Equal Opportunity Employer:

In compliance with federal law, all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment eligibility verification document form upon hire.

SimSpace is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, pregnancy, genetic information, disability, status as a protected veteran, or any other protected category under applicable federal, state, and local laws. We are committed to providing an inclusive and welcoming environment for all members of our staff, clients, volunteers, subcontractors, vendors, and clients.

Research shows that women and people from underrepresented groups only apply to jobs if they meet all of the qualifications. However, no one ever meets 100% of the qualifications. SimSpace encourages you to break that statistic and to apply. We look forward to your application!

We also consider qualified applicants regardless of criminal histories, in accordance with applicable law. We are committed to providing reasonable accommodations for qualified individuals with disabilities in our job application procedures. If you need assistance or accommodation due to a disability, please contact careers@simspace.com.

SimSpace does not accept unsolicited resumes from employment agencies.

Actual compensation for the position is based on a variety of factors, including, but not limited to affordability, skills, qualifications and experience, and may vary from the range.