About Optimus.
Optimus US Tax & Accounting combines deep technical expertise with a forward-looking approach to financial compliance and advisory. Our journey is defined by a commitment to accuracy, transparency, and client success — helping individuals and businesses navigate the complexities of US taxation and accounting with confidence.
At the core of our tax, accounting, and advisory services is a strong foundation of regulatory knowledge and analytical capability. From experienced tax professionals and CPA-reviewed processes to dedicated compliance and bookkeeping teams, we deliver dependable insights and practical solutions that support informed financial decisions.
Tax Services
We guide clients through every stage of their tax lifecycle — from planning and preparation to filing and representation. Our approach focuses on minimizing risk, maintaining compliance, and identifying strategic opportunities. Backed by experienced professionals and structured review processes, we combine regulatory expertise with careful analysis to ensure accuracy and reliability. We simplify complex requirements, helping clients meet obligations while staying focused on growth and financial stability.
Accounting & Bookkeeping
Our accounting and offshore bookkeeping services provide businesses with clarity and control over their financial operations. From day-to-day transaction management to financial reporting, we ensure records are precise, organized, and audit-ready. By integrating efficient workflows and experienced oversight, we deliver dependable reporting that supports better planning, decision-making, and long-term sustainability.
Advisory & Compliance
Optimus US Tax & Accounting supports businesses as they grow and evolve in a changing regulatory environment. Our advisory services are designed to provide strategic direction, operational insight, and compliance assurance. We work alongside clients to strengthen financial processes, address regulatory challenges, and create scalable solutions — always focused on delivering measurable outcomes and lasting value.
About Aarthi Ravikumar Licensed US CPA
Aarthi Ravikumar is a Licensed US CPA with over 5 years of hands-on experience across the full U.S. tax lifecycle, covering tax accounting, tax compliance, tax audits, and advisory services for a wide spectrum of clients. Her expertise spans business, individual, non-profit, trust, and estate taxation, with deep exposure to both federal and all 50 U.S. state tax jurisdictions.
Aarthi's professional foundation was built through Big 4 experience at EY, followed by independent freelance practice of tax compliance, where she led end-to-end tax engagements and directly managed client relationships. This combination of technical depth and practical execution uniquely positions her as an offshore partner under white label collaboration who understands both compliance precision and real-world business needs.
Depth of Technical Expertise
Aarthi has successfully managed the entire tax cycle, including planning, preparation, review, filing and audit support across:
- Business Returns – Forms 1065, 1120, 1120-S, including multi-state apportionment
- Individual & Non-Resident Returns – 1040 & 1040-NR, foreign income and residency analysis
- Trusts & Estates – Form 1041, beneficiary reporting, K-1 allocations
- Non-Profit Organizations – Form 990 series, compliance and governance reporting
- Multi-State Filings – Nexus determination, state compliance across all 50 states
- Tax Accounting & Provisions – ASC 740, FIN 48, ETR, PTR, BSR analysis
- Tax Audits & Risk Management – Audit support, documentation and issue resolution
- International Tax & Research – Treaty analysis, BEPS, cross-border considerations
Her experience also includes working with advanced tax and finance platforms such as SAP, BlackLine, PeopleSoft, Cadency and Citrix, ensuring accuracy, audit readiness and process efficiency.
Application of Experience at Optimus Tax & Accounting LLP
As Owner and Partner at Optimus Tax & Accounting LLP, Aarthi applies her Big 4 rigor and practitioner mind-set to build a firm that delivers U.S.-standard quality with scalable offshore efficiency.
Her role focuses on:
- Technical leadership and quality control across all U.S. tax engagements
- Designing robust review processes to ensure accuracy, compliance and risk mitigation
- Managing complex and multi-state tax engagements for U.S. and international clients
- Training and mentoring tax professionals to meet U.S. CPA firm expectations
- Acting as the final technical authority for complex tax positions and filings
Under her leadership, Optimus has developed strong capabilities in handling high-volume tax compliance and bookkeeping services without compromising technical integrity, making the firm a trusted offshore partner for U.S. CPA firms and global clients.
Professional Philosophy & Value Proposition
Aarthi believes that effective tax services go beyond filing returns — they require technical precision, proactive risk assessment and client-centric advisory thinking. Her approach blends regulatory expertise, process discipline and practical judgment, ensuring clients receive accurate, timely and defensible tax solutions.
As a Partner, she brings the confidence of a U.S. licensed CPA, the discipline of Big 4 training, and the agility of an entrepreneurial practitioner, positioning Optimus Tax & Accounting LLP as a reliable, scalable and quality-driven U.S. tax & bookkeeping services partner.
About Senthil Kumar Ravisekar
Senthil Kumar Ravisekar is a seasoned entrepreneur and business leader with over 19 years of diversified business experience, spanning Financial controller & operations leadership, strategic growth and business development across multiple industries in India.
With a proven track record as Managing Director of successful ventures in the automotive and travel sectors, Senthil Kumar has consistently built, scaled, and stabilised businesses by combining people-first leadership with process-driven execution. His ability to recruit, retain and manage high-performing teams has been a cornerstone of long-term operational success.
Core Strengths & Leadership Approach
Senthil Kumar's expertise lies in translating strategy into execution. Over nearly two decades, he has developed strong capabilities in:
Financial controller
Financial Controller with expertise in strategic finance, governance and scalable financial operations with accurate reporting, strong controls and growth-focused insights.
HR Management & Workforce Leadership
Building structured teams, defining roles, setting KPIs and creating accountability frameworks that support sustainable growth.
Business Development & Growth Strategy
Identifying market opportunities, forging strategic partnerships, strengthening client relationships and driving revenue expansion through trust-based engagement.
Entrepreneurial Decision-Making
Leading organizations through expansion cycles, risk management and long-term planning with a strong ownership mindset.
Role at Optimus Tax & Accounting LLP
As Owner / Partner at Optimus Tax & Accounting LLP, Senthil brings his 19 years of real world business leadership into the professional services domain. His role focuses on business operations, HR structuring, client engagement strategy, and growth planning, complementing the firm's technical tax and accounting expertise.
At Optimus, Senthil Kumar has successfully applied his experience to:
- Establish strong internal team structures and performance management systems
- Drive business development initiatives and offshore collaboration models
- Strengthen client onboarding, relationship management, and service delivery workflows
- Support the firm's vision of becoming a scalable, process-driven global accounting partner
Value Proposition
Senthil Kumar represents the bridge between technical excellence and business execution. His leadership ensures that Optimus Tax & Accounting LLP operates not just as a compliance-focused firm, but as a professionally managed, growth-oriented organization capable of serving international clients with consistency, reliability and long-term partnership value.