Tokyo HirePlanner Japan | Find Jobs in Japan, Work in Japan, Careers in Japan 🇯🇵
概要


Tata Consultancy Services Japan (TCS) is a global leader in IT services, consulting, and business solutions, helping clients simplify and evolve complex IT environments to drive business transformation.

We are seeking an experienced Mainframe Administrator (AS400) to join a large-scale infrastructure project for a global insurance company.


In this role, you will be responsible for the administration, maintenance, and optimization of AS400 Mainframe systems, ensuring high availability, performance, and reliability of critical applications.

You will work closely with both onsite and offshore teams, coordinating with clients to support seamless application transitions and system stabilization.

The position also offers opportunities to contribute to various transformation initiatives, including performance tuning, storage optimization, and process improvements, making it ideal for professionals looking to expand their expertise in mainframe environments and infrastructure management.


This is a unique opportunity to join a highly skilled team at TCS Japan, gain exposure to large-scale insurance IT operations, and play a key role in maintaining and enhancing enterprise-level Mainframe systems.

Strong collaboration, technical expertise, and problem-solving skills are essential, as you will interact with client SMEs, manage batch job workflows, oversee disaster recovery exercises, and document infrastructure administration procedures according to industry best practices.

スキル・資格

【Must】

JLPT N2 or N1 certified. Fluent in reading, writing, and conversing in Japanese with native speakers
Must have more than 5 years of IT experience in AS400 Server adminsitration and maintenance projects
Ability to effectively coordinate with Customer SMEs, Onsite and Offshore teams
Actively involve in Application transition and stabilization phases by aligning to Japan (JST) working hours

【Nice to have】

Exposure on IBM iSeries architecture/components, ITIL, Agile methodology, DevOps
Insurance domain knowledge is added advantage

業務内容

【About Project】

Large-scale project for Global Insurance company.

【Role and responsibilities】

Fluent in reading, writing, and conversing in both Japanese & English languages to establish good coordination and communication with Customer, Onsite and Offshore teams
Hands on experience on AS400 system adminstration
Actively involve in the primary responsibilities that include but not limited to:
Install, maintain and upgrade any assets required to support the Mainframe life cycle, capacity or performance requirements, including servers Mainframe Infrastructure, storage devices, server applications, database, middleware, system automation, and service utilities
Implement and coordinate all change management activities to the infrastructure including those that may affect any service levels, including those with respect to other services, or any service levels provided by other Service Contractors
Implement and manage scheduling tools for managing/automating job execution (e.g., job workflow processes, interdependencies, CLIENT contacts, and rerun requirements file exchange functions)
Execute ad hoc, scheduled and on-demand production and non-production batch jobs on required systems
Plan and implement validation of DR solution via exercises at an agreed to frequency with CLIENT
Develop and document in the Standards and Procedures Manual infrastructure platform administration procedures that meet requirements and adhere to defined policies
Actively contribute towards various Transformation initiatives (Process maturity, Performance tuning, Storage optimization, etc.) to achieve the project goals
Collaborate with Infra, IT and business teams to ensure seamless system availability and performance.
Participate in performance reviews, technical documentation, and knowledge sharing.

その他


Work Location:
Tokyo Office / 東京事業所採用

Work 4 days a week at client office(Tokyo), 1 day a week work from home

週4日クライアント先(東京23区)での就業、週1日在宅勤務可能

勤務時間

9:00~18:00

その他待遇、手当等

■給与


月給:
経験・能力など考慮の上、当社規程により決定


裁量労働手当:
有(60,000-80,000円/月支給) *管理監督者グレードでの採用の場合は無し


残業手当:
なし


昇給:
都度


賞与:
あり

■福利厚生


保険:
健康・厚生年金・雇用・労災保険


制度:
財形貯蓄・確定拠出年金・カフェテリアプラン(選択型法人会員福利厚生サービス)

※財形貯蓄・確定拠出年金は正社員のみ対象


施設:
法人会員施設(スポーツクラブ、温泉保養所、ホテル他)

休日休暇

年次有給休暇(初年度10日 ※入社日によって異なる場合有)

完全週休2日制(土曜日・日曜日)

祝日

年末年始

慶弔休暇

育児・介護休業

勤務地情報

国 / 地域 日本 都道府県 東京都 勤務地(住所) Minato-ku, Azabudai, 1−3−1 応募

この求人に応募するには、サインインもしくはアカウント作成が必要です。
Show more Show less

  • Tokyo HirePlanner Japan | Find Jobs in Japan, Work in Japan, Careers in Japan 🇯🇵 ¥900,000 - ¥1,200,000 per year

    Tata Consultancy Services Japan is seeking an experienced Mainframe Administrator to join a large-scale infrastructure project for a global insurance company. The successful candidate will be responsible for the administration, maintenance, and optimization of AS400 Mainframe sys ...


  • Tokyo HirePlanner Japan | Find Jobs in Japan, Work in Japan, Careers in Japan 🇯🇵 ¥4,000,000 - ¥6,000,000 per year

    Join a large-scale project for a global insurance company as a Mainframe Storage Administrator. Manage and maintain enterprise storage systems, including DASD, RAID, SAN, NAS, tape, and optical storage. Ensure seamless infrastructure performance across mission-critical systems. · ...


  • Tokyo MetLife Japan ¥2,000,000 - ¥2,500,000 per year

    We are seeking an experienced leader to head our Core Insurance Systems Group in Tokyo. · The successful candidate will lead end-to-end delivery of technology solutions. · Drive systems delivery to meet business objectives. · ...


  • Tokyo スキルハウス・スタッフィング・ソリューションズ株式会社

    Lead world-class digital modernization programs at a Fortune 500 insurance leader. · Lead the modernization of core insurance and legacy systems using cloud AI data-driven technologies. · ...


  • Tokyo NN Group Full time

    We are seeking a bilingual Data Engineer (more than 5 experience) fluent in Japanese and English to join our Data & Analytics Division (equivalent to a Chief Data Officer Office). The successful candidate will play a key role in facilitating the migration of data from our legacy ...

  • Hack4JobTokyo

    1ヶ月前


    Tokyo MetLife ¥800,000 - ¥1,200,000 per year

    Join MetLife's Hack4JobTokyo, an exciting Technology Engineering Challenge happening in Tokyo on February 7, 2026. In this in-person Hackathon, you'll have the opportunity to hack into a new engineering career at MetLife. · At MetLife, we're redefining the customer experience wit ...


  • Tokyo スキルハウス・スタッフィング・ソリューションズ株式会社

    A Global and one of the world's largest Insurance Service provider is looking for a strong bilingual leader for the Assistant VP Core Insurance Mainframe Modernization within Information Technology Department. · ...


  • Tokyo Hitachi Energy ¥4,000,000 - ¥8,000,000 per year

    Hitachi Energy's Grid Automation business unit has a comprehensive portfolio of solutions addressing all key segments connected to the energy system including generation transmission distribution industries transportation infrastructure sectors. · ...


  • Tokyo Athene

    We are driven to do more. More for our customers and the financial professionals who offer our products.If you are driven to do more and love the challenge of pursuing more, Athene is your kind of company. · ...


  • Tokyo Athene Full time

    We are driven to do more. More for our customers and the financial professionals who offer our products. If you are driven to do more and love the challenge of pursuing more, Athene is your kind of company. · You will find we offer more than the basics to create an inclusive and ...


  • Tokyo Guidewire Software

    We combine digital, core, · analytics, · A I to deliver our platform as a cloud service.More than 540+ insurers in · countries,fro mnew ventures to the largestand most complex in · ...


  • Tokyo NN Group Full time

    The Enterprise Architect is a senior-level role responsible for designing implementing and maintaining the overall architecture that supports strategic objectives of NN Life Japan This position ensures that business goals regulatory requirements and industry best practices are tr ...

  • Sales Specialist

    2週間前


    Tokyo Hitachi Energy

    The opportunity to sell products/systems/services to customers and establish effective customer relationships is available at Hitachi Energy. · You will sell products/systems/services to customers, focusing on volume, mix and profitability targets for assigned Business Units/Prod ...

  • Sales Engineer

    2週間前


    Tokyo Hitachi Energy ¥1,687,500 - ¥2,147,500 per year

    +Job summary · Hitachi Energy's Grid Integration business unit has delivered more than 4,000 projects over the last 15 years.We incorporate the integrated systems · ,solutions and services of our business' DC and AC fields, · including HVDC, · Substations, · Facts,and Power Quali ...

  • Test Manager

    2週間前


    Tokyo コグニザント Cognizant ¥600,000 - ¥1,800,000 per year

    We are seeking a solution to strengthen testing across the client's P&C insurance ecosystem. · The Test Manager will be responsible for engaging with client stakeholders,A critical aspect of this role is to identify areas for testing transformation and define a roadmap to impleme ...

  • Senior Consultant

    2週間前


    Tokyo Veeva Systems

    We are looking for driven individuals who enjoy combined role project management and solution architect Also interested in industry-leading Life Sciences Commercial solutions. · As a key member of our Professional Services team you'll be at the forefront of our mission You'll wor ...

  • Assistant HR

    4週間前


    Tokyo EVISU ¥2,000,000 - ¥2,800,000 per year

    We are looking for an Assistant Human Resources & Admin Manager to join our team and help us continue our tradition of excellence. · Bachelor's degree in Human Resources Management or business-related disciplines · Minimum 5 years of relevant working experience, preferably from F ...


  • Tokyo Western Union Full time

    The KYC Assistant Manager will supervise and develop a team of KYC Specialists supporting Western Union digital customers in Japan. · ...

  • HR Manager

    1ヶ月前


    Tokyo International SOS ¥5,000,000 - ¥8,000,000 per year

    The HR Manager supports the Country Head and Service Delivery team in workforce staffing and admin tasks for business results. · Provide effective sourcing and recruitment support. · Assist in designing job descriptions and map relevant competencies. · Refine recruiting processes ...


  • Tokyo Veeam Software Full time

    This role will play a key role to inform and execute people strategies across our operations in Japan. · The Senior HR Business Partner will serve as the main point of contact for all HR-related matters, supporting brilliant execution of people initiatives whilst ensuring complia ...


  • Tokyo HirePlanner: Your Career Platform for Finding a Job in Japan

    This position is responsible for full cycle of Member's new entry change of types of memberships and resignations. · ResponsibilitiesGreeting and making cards for members at the counter · Respond promptly to incoming calls and emails address inquiries provide accurate information ...