Verified from career page · Posted yesterday

Jane Street

IT Security Specialist New

Jane Street · IT and Systems Engineering

London

Mid-level

SecurityPowerShell

Last seen 8h ago

Posted
yesterday

Posted on 5 October 2026

Workplace
Not specified

Work model not stated

Salary
Not disclosed

Salary range not shared by the company

Visa sponsorship
Not specified

Visa sponsorship details unknown

About the position

We are looking for an enthusiastic, motivated and technologically curious individual with a Windows security focus to join Jane Street's IT Security team. Our team is dedicated to securing the firm's Windows and macOS computing platforms, which you will contribute to through a combination of technical hands-on work, cross-team collaboration and creative problem-solving. Responsibilities of this role will include:

Deploying, documenting and supporting our security controls at scale

Acting as a key contributor to our vulnerability management programme, ensuring vulnerabilities are rigorously detected and mitigated

Providing security guidance and support to the broader IT department as well as our IT Operations Team as security incidents arise

Developing both technical and non-technical solutions in collaboration with engineering teams that address security concerns

Contributing to the development of our team’s operational playbooks, procedures, guidelines and technical security standards

We’re looking for someone who fully enjoys working with and being around people, takes pleasure in triaging complex problems and is able to delegate and escalate tasks effectively. This role is anything but siloed; we’ll rely on you to be a key liaison between the IT Security team and other internal technology groups to distill and communicate pertinent information. While we’re open to individuals from a range of backgrounds, someone who’s worked in a code-driven environment and has hands-on experience with security incident response is preferred.

About you

Have 5+ years of experience as a security or operations engineer, with a technical background rooted in Windows

Experienced with maintaining, supporting and administering Windows platforms at scale, including Active Directory and Group Policy

Solidly understand common attack scenarios targeting the Windows platform, as well as the protection technologies designed to mitigate them

Strong troubleshooter, comfortable triaging security incidents and production issues; familiar with trend and log analysis, with hands-on experience using system monitoring and alerting tools to identify production disruptions

Have hands-on experience deploying and implementing endpoint security controls at scale (anti-malware, EDR, application control, log aggregation, host-based firewalls, disk encryption, etc.)

Comfortable with PowerShell, including experience scripting or building tooling to automate security tasks

Knowledge of macOS and mobile device security fundamentals is a plus

Excellent written and verbal communicator; able to explain processes clearly to colleagues across the firm

Comfortable working in an environment with shifting priorities

Collaborative and approachable; eager to be a team player

Fluent in English

If you're a recruiting agency and want to partner with us, please reach out to agency-partnerships@janestreet.com

About Jane Street

Jane Street's European postings are all London. It's a proprietary trading firm building its own trading and research infrastructure in OCaml — the interview process is famously technical, and the roles here are engineering, not finance, despite the industry.

Apply at Jane Street

Similar roles

  1. Financial Reporting Accountant Jane Street Accounting London Finance Top-tier Not disclosed Visa: Not specified 1w ago
  2. Cybersecurity Engineer: Security Operations Center (SOC) Jane Street Cybersecurity London SecuritySIEM / SOC Top-tier Not disclosed Visa: Not specified 1w ago
  3. Trading Desk Operations Engineer Jane Street Trading Desk Operations London Software Top-tier Not disclosed Visa: Not specified 1mo ago
  4. Windows Engineer Jane Street IT and Systems Engineering London SoftwareCI/CDC# / .NETPowerShell Top-tier Not disclosed Visa: Not specified 1mo ago
  5. Graphic Designer Jane Street Creative Engagement London Design Top-tier Not disclosed Visa: Not specified 1mo ago
  6. Procurement Specialist Jane Street IT and Systems Engineering London Operations Top-tier Not disclosed Visa: Not specified 1mo ago
5,538 more roles like this. Open the board →