Cohesity is the leader in AI-powered data security. Over 13600 enterprise customers including over 85 of the Fortune 100 and nearly 70% of the Global 500 rely on Cohesity to strengthen their resilience while providing Gen AI insights into their vast amounts of data. Formed from the combination of Cohesity with Veritas enterprise data protection business the companys solutions secure and protect data on-premises in the cloud and at the edge. Backed by NVIDIA IBM HPE Cisco AWS Google Cloud and others Cohesity is headquartered in Santa Clara CA with offices around the globe.

Weve been named a Leader by multiple analyst firms and have been globally recognized for Innovation Product Strength and Simplicity in Design and our culture.

Want to join the leader in AI-powered data security

About the Role

We are looking for a highly experienced Staff Engineer with deep expertise in Windows internals Active Directory internals and AD security. This is a single combined role: you will build the Windows agent model Active Directory at the protocol and database level and reason about how attackers compromise a directory and how a defender recovers from it. The work spans granular change tracking object recovery forest-level backup identity threat detection and full forest recovery onto clean operating systems.

How Youll Spend Your Time Here

- Design and deliver AD protection features: granular change tracking object- and attribute-level recovery forest-aware backup and full forest recovery.
- Build and own the Windows agenta signed serviceable silently upgradeable component running on domain controllers.
- Design identity threat detection: change-delta engines rules for privileged-object and ACL abuse and the findings pipeline into audit log and SIEM.
- Own the safety of write and restore paths idempotent steps USN-rollback safety pre-flight validation before any destructive action.
- Engage across the security lifecycle: threat modeling architecture review attack-surface reduction vulnerability remediation.
- Work hands-on in code and test automation including automated recovery drills and fidelity validation.
- Lead projects mentor engineers and build Windows and AD depth across the team.

Wed Love to Talk to You If You Have Many of the Following

Education

- B.S./M.S./Ph.D. in Computer Science Electrical Engineering or a related field.

Experience

- 10 years in software design and development with significant time on Windows-platform software.




- 5 years with Active Directory internals building software that reads writes replicates backs up or recovers directory data not only administering it.
- 3 years security-focused: identity security detection engineering security architecture or product security.
- Shipping agent or systems software onto customer-managed production infrastructure.

Windows Platform & Agent Engineering

- Windows internals: registry and hive structure the SYSTEM hive and BootKey material WMI services RPC.
- Agent development in C C# or Go; VSS writers and shadow copy APIs writer sets freeze/thaw DiskShadow orphaned shadows.
- Windows security model: SIDs tokens privileges ACLs and SDDL impersonation service accounts.
- Serviceability and transport: code signing MSI packaging silent upgrade mTLS and certificate handling gRPC agent-to-cluster channels with resumable operations.
- Debugging: WinDbg ETW performance counters dump analysis; PowerShell modules remoting and hosting PowerShell from native code.

Active Directory Internals

- Schema object classes naming contexts linked-value replication; safe writes modify ModifyDN object create.
- LDAP at depth: filters server controls paged and persistent search change notification; DirSync and USN cookies for incremental capture.
- Tombstones deleted-object lifetime Recycle Bin; SID SID history and GUID continuity semantics.
- Group Policy internals (GPC/GPT SYSVOL DFSR/FRS authoritative restore); AD-integrated DNS zones forwarders delegation.
- Database and topology mechanics: ESE/JET and logs esentutl FSMO trusts repadmin/dcdiag USN rollback DC promotion IFM DSRM RODC.

Active Directory Security & ITDR

- Kerberos and NTLM internals: ticket flow delegation krbtgt and its role in forest compromise and recovery.
- AD attack techniques and their detectable artifacts DCSync DCShadow AdminSDHolder tampering ACL abuse privileged group manipulation ticket forgery.
- Detection engineering: deterministic rules with low false-positive rates baseline-diff and attack-path reasoning; AD auditing and change attribution.
- Cyber recovery of identity: clean-source and clean-OS principles malware re-introduction risk in image-based restore isolation during recovery.




- SIEM integration (syslog CEF webhooks); threat modeling a component that runs privileged on a domain controller.

General

- Distributed systems: durable state machines idempotency crash recovery and resume long-running orchestration. Protocols: LDAP Kerberos DNS SMB TLS gRPC REST.
- Test automation for infrastructure software: multi-domain forest labs destructive recovery drills upgrade and interop matrices.

Soft Skills

- Excellent analytical skills under incomplete information customer forests are never the lab forest.
- Ability to lead initiatives mentor and explain directory-level failure modes to non-specialist audiences.
- Sound judgement about risk. Recovery software gets one chance to be right and knowing when not to proceed matters as much as knowing how.

Nice to Have

- A commercial AD backup recovery or ITDR product or having executed a real forest recovery.
- AD tooling DSInternals BloodHound PingCastle; hybrid identity with Entra ID and Entra Connect.
- Windows kernel or filter driver work; EDR allowlisting; air-gapped or regulated environments.
- Published security work CVE credits Red/Blue Team experience; OSCP GCFA or equivalent.

Location

- This position is located in our office in Bangalore or Pune India.

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Equal Employment Opportunity Employer (EEOE)

Cohesity is an Equal Employment Chance Employer. All qualified applicants will receive consideration for employment without regard to race color creed religion sex sexual orientation national origin or nationality ancestry age disability gender identity or expression marital status veteran status or any other category protected by law.

If you are an individual with a disability and require a reasonable accommodation to complete any part of the application process or are limited in the ability or unable to access or use this online application process and need an alternative method for applying you may contact us atCOHESITY or for assistance.

In-Office Expectations

Cohesity employees who are within a reasonable commute (e.g. within a forty-five (45) minute average travel time) work out of our core offices 2-3 days a week of their choosing.

We strongly prefer candidates who are currently located in or near the designated job location. Candidates outside the area should apply only if they are committed to relocating prior to their start date and have the legal right to work in the job location.

Required Experience:

Staff IC

📌 Staff Security Engineer (Pune)
🏢 Cohesity
📍 Pune