The posting
About the Role: The team: The OSTTRA Japan team is a dynamic, highly collaborative group that serves as the operational heartbeat of our regional presence. The purpose of this team is to ensure a functional, efficient, and welcoming environment for all members, seamlessly blending office management, business operations, and HR support to drive the local and global success of the business. Responsibilities and impact:
HR & Employee Lifecycle Leadership: Act as the first point of contact for local HR queries, coordinating the entire employee lifecycle from onboarding to offboarding, and administering local benefit programs (DC Pension, CB RAP).
Global Finance & Compliance Operations: Partner with Global Finance to manage the Japan entity’s domestic bank account administration, accounts payable, corporate taxes, and statutory document filings.
Workspace & Facilities Management: Serve as the primary contact for all office-related matters, working with Global Facilities and local vendors to optimize office logistics, moves, and daily workspace operations.
Business Continuity & Event Execution: Drive regional engagement and readiness by planning social, DEI, and marketing events, while assisting senior management with emergency and business continuity planning.
Corporate Governance Support: Manage critical local administrative duties, including the safekeeping of company seals, contract management, and arranging certified copies of registers.
Global Exposure & Impact: Accelerate your career in a multinational environment by collaborating daily with regional and global HR, Finance, and Facilities teams to shape the operational success of the Japan office.
What we’re looking for: Fundamental requirement:
3+ years of experience in office management, administrative, operational support, or Human Resources within a fast-paced corporate environment.
Native or business-level fluency in both Japanese and English.
Solid understanding of general office management procedures, basic HR functions, and finance processes.
Proficiency in Microsoft Office Suite (Word, Excel, PowerPoint) and office management software.
Deep understanding of Japanese business culture and etiquette.
Excellent organizational and time management skills, with a high degree of accuracy when handling multiple projects.
Proactive and capable of working independently to problem-solve and adapt to changing priorities.
High level of professionalism and absolute discretion when handling confidential information.
Additional preferred requirements:
Bachelor's degree or relevant certifications in office administration, human resources, or business management.
Previous experience working in a global or multinational company.
A flexible, resourceful, "can-do" attitude with a willingness to take on varied tasks to support the wider team's success.
The location: Tokyo, Japan Our Benefits: Global vision, local impact At OSTTRA, our benefits philosophy offers a market-competitive package that reflects our position as an industry leader. We want to ensure you feel valued, secure, and empowered wherever you are in the world. Our approach is built on three core pillars: Global foundations: We provide a baseline of excellence across all our offices, focusing on comprehensive Health & Wellness, Financial Security, and Work-Life Balance. No matter your location, you are part of a culture that prioritizes your holistic well-being. Locally tailored: We benchmark in each market to ensure our packages are genuinely competitive where you live and work. Flexibility and growth: We empower you to work in a way that suits your life. This includes a hybrid working model, generous leave policies, and a commitment to your continuous professional development. The Trust employee ownership plan : Every employee at OSTTRA is an owner, and a member of The Trust, our employee ownership programme. Our distinct culture encourages colleagues to think and act like owners and raise the bar constantly. This plan reflects our belief that when we work together to build a stronger, more valuable organisation, then all colleagues should benefit from the value we create. About OSTTRA: We build and operate the infrastructure that the world’s post-trade financial system runs on. Launched in 2021, we have unified more than 20 years of heritage and expertise from four industry leaders into a single, integrated business. Today, we operate a trusted network that connects thousands of market participants to streamline end-to-end workflows, from trade capture through portfolio optimization. We translate industry change into a workable process, engineering an open, intelligent ecosystem that removes friction and reduces risk for the global markets. Our distinct ownership culture is underpinned by four behaviours: boldness, curiosity, accountability, and collaboration. In 2025 we were acquired by KKR, one of the world’s most successful private equity firms, and are on a journey of growth and impact. Joining our team now is a unique opportunity - you will help to shape the next generation of post-trade, transform shared infrastructure into shared benefit, and accelerate your own career. Learn more at www.osttra.com. Equal opportunity employer statement at OSTTRA: We are committed to fostering a connected and engaged workplace where all colleagues have access to opportunities based on their skills, experience, and contributions. Our hiring practices emphasise fairness, transparency, and merit, ensuring that we attract and retain the best talent. By valuing different perspectives and promoting a culture of respect and collaboration, we drive and operate the infrastructure that the world’s post-trade financial system runs on.
