Senior Accountant

Our employees are truly our greatest asset. We have spent years building a team of talented, dedicated technologists, data-driven traders, and expert leaders with an emphasis on our core pillars: People, Process, Trading Edge, and Technology. Simplex is an in-office organization, helping to foster a collaborative and communicative culture. Simplex Trading is seeking a motivated, detail-oriented Senior Accountant to join our Finance team in our Chicago, Illinois office. This is a full-time, in-office position. The Senior Accountant will play a critical role in maintaining the accuracy and integrity of the firm’s financial records, supporting regulatory compliance, and driving process improvements across our accounting function. The ideal candidate has experience in a broker-dealer or financial services environment, a strong command of GAAP, and a proactive mindset for identifying and implementing efficiencies. KEY RESPONSIBILITIES General Ledger & Month-End Close Own and execute the monthly and quarterly close process, including journal entries, account payable, account reconciliations, and variance analysis Maintain the general ledger and ensure accuracy and completeness of all financial data Coordinate with Accountant, operations and trading teams to reconcile trade invoicing Regulatory Reporting Maintain working knowledge of applicable SEC and FINRA financial responsibility rules, including SEC Rules 15c3-1, and ensure the firm remains in compliance. Prepare monthly and quarterly FINRA reporting in a timely and accurate manner. Liaise with external auditors, regulators, and compliance personnel as needed Tax Preparation & Compliance Assist in the preparation of federal, state, and local tax returns and estimated tax payments Support the annual tax provision process and maintain tax-related workpapers and documentation Coordinate with external tax advisors on tax planning and compliance matters Monitor changes in tax legislation relevant to broker-dealers and proprietary trading operations Financial Statements & Reporting Prepare accurate monthly, quarterly, and annual financial statements in accordance with GAAP Support the preparation of management reports and financial analysis for senior leadership Assist in the annual audit process, serving as a primary contact for external auditors and preparing audit schedules and supporting documentation Ensure financial reports are completed accurately and on schedule Technology & Process Improvement Own the firm's credit card spend and expense reimbursement program, including policy enforcement, employee communication and monthly reporting. Identify opportunities to streamline and automate accounting processes Participate in the evaluation and implementation of accounting systems and technology Document accounting policies and procedures and recommend improvements to enhance internal controls Collaborate cross-functionally with technology and operations teams on finance-related system initiatives QUALIFICATIONS Required Bachelor’s degree in Accounting, Finance, or a related field 4-7 years of progressive accounting experience, preferably within a broker-dealer, proprietary trading firm, or regulated financial services environment Willing to sit for FINRA licensing exams to ensure regulatory compliance with the scope of the role Strong working knowledge of GAAP and financial reporting standards CPA license (active) Preferred Experience with options, derivatives, or equity securities accounting, a plus Exposure to process automation tools or accounting system implementations such as Claude, NetSuite or Intacct Public accounting experience is a plus Annual base salary ranges from $130,000 to $150,000, and is influenced by a number of factors, including qualifications and experience. This role is also eligible for an annual discretionary bonus, which can be a significant portion of total compensation. This full time role is also eligible for other forms of compensation and benefits including health/dental/vision insurance, and 401(k) contributions. Sr. Accountant pay range $130,000 — $150,000 USD Why us? Founded in Chicago in 2004, Simplex is a leading, technology-driven, proprietary market-making firm. We work with the most advanced technology and software in the market, and we’ve continued to remain at the forefront of the industry by always focusing on innovation, automation, and data-driven analysis. We also leverage our experience and expertise to make strategic investments and capitalize on opportunities in the venture capital markets with promising, early-stage financial and technology start-ups. PLUS, the goods! Benefits: Excellent a la carte Medical/Dental/Vision (free employee coverage!), 401(k) match, generous parental leave! The Office: The kitchen is stocked with snacks, and beverages; you also have daily stipends for breakfast and lunch! Tuition Reimbursement: As an investment in our employees’ careers and the company’s future, we offer educational assistance to provide employees with professional development opportunities that increase their skills and enhance their contributions to the organization! Employee Discounts: To gyms, national brands, and more! Building: We are located in the Federal Reserve building. As a tenant, you have access to a building gym and a full cafeteria. We are easily accessible to all public transportation. Charity Match: We match up to $2,000 a year in donations to the charities of your choice! Fun Events: In-person happy hours, celebrations throughout the year, game nights, video game fun, and so much more! Simplex is an Equal Opportunity Employer. Simplex and its recruitment partners may use artificial intelligence (AI) tools to support certain aspects of the recruiting and hiring process. Final hiring decisions are made by humans. For all job postings, Simplex may use AI to review and analyze applications, resumes, interviews, and applicant responses. Simplex complies with applicable federal and state laws governing AI use. Applicants may still request reasonable accommodations. For more information related to AI or to request an accommodation, please contact [email protected] .

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