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Mihirajmera/README.md

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I am a Cybersecurity Graduate Student and the Founder & CTO of Postura. I specialize in building autonomous multi-cloud security remediation platforms, orchestrating event-driven AWS security automation, and implementing continuous compliance lifecycles.

"Securing systems isn't just about detecting threats β€” it's about automating remediation at scale."


πŸš€ Featured Project: Postura

Autonomous Multi-Cloud Security Remediation Platform Real-time threat ingestion, risk scoring mapped to industry frameworks, and human-in-the-loop automated IaC drift repair.

πŸ“ System Architecture & Remediation Workflow

graph TD
    %% Styling Definitions
    classDef cloud fill:#fdf6e2,stroke:#ff9900,stroke-width:2px;
    classDef engine fill:#e1f5fe,stroke:#0288d1,stroke-width:2px;
    classDef framework fill:#efebe9,stroke:#5d4037,stroke-width:2px;
    classDef pipeline fill:#e8f5e9,stroke:#388e3c,stroke-width:2px;

    subgraph Cloud_Layer [Target Multi-Cloud Environment]
        GD[AWS GuardDuty Alerts] -->|Event Stream| SH[AWS Security Hub]
        CT[CloudTrail Logs] --> SH
    end

    subgraph Postura_Core [Postura Core Engine]
        SH -->|Webhook Ingestion| Ingest[Ingestion Pipeline]
        Ingest --> Engine[Risk Scoring Engine]

        subgraph Compliance_Mapping [Framework Mapping]
            Engine --- NIST[NIST CSF 2.0]
            Engine --- MITRE[MITRE ATT&CK]
        end

        Engine -->|State Analysis| Drift[Terraform Patch Generator]
    end

    subgraph Governance [Human-In-The-Loop Flow]
        Drift -->|Webhook Alert| Intercept{UI / Slack Approval}
        Intercept -->|Approved| GH[GitHub Actions CI/CD]
        Intercept -->|Rejected| Drop[Log & Drop Event]
    end

    GH -->|Terraform Apply| AWS[Remediated AWS Infrastructure]

    class GD,SH,CT,AWS cloud;
    class Ingest,Engine,Drift engine;
    class NIST,MITRE framework;
    class Intercept,GH,Drop pipeline;
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πŸ“Œ Featured Projects

πŸ›‘οΈ Professional Experience & Workflows

American Express β€” GRC Engineer (Jun 2025 – Present)

  • Run technology risk and security control assessments across payment and enterprise platforms using ServiceNow GRC and NIST CSF 2.0, reducing high-risk findings through prioritized remediation.
  • Test and validate controls against NIST SP 800-53 Rev. 5 and PCI-DSS v4.0, improving audit readiness across 120+ security controls.
  • Maintain enterprise risk registers in RSA Archer; partnered with technology teams to cut overdue risk items by 20%.
  • Built executive risk/compliance dashboards in SQL and Power BI for KRI, control health, and remediation visibility.

KPMG β€” GRC Engineer (Jan 2022 – Jul 2024)

  • Monitored 200+ security controls across banking operations against FFIEC, SOX, PCI-DSS, and NIST CSF using ServiceNow GRC.
  • Conducted ITGC testing (SailPoint, Active Directory) covering access reviews, change management, and segregation of duties for SOX compliance.

πŸ”„ Continuous GRC & Engineering Lifecycle

graph LR
    Scan[Vulnerability & Drift Scanning] -->|Identify Gaps| Assess[Risk Evaluation & Framework Mapping]
    Assess -->|Generate Remediation| Orchestrate[Automated Orchestration]
    Orchestrate -->|Deploy Fixes| Verify[Remediation Verification]
    Verify -->|Update Metrics Dashboard| Scan

    style Scan fill:#eceff1,stroke:#455a64,stroke-width:2px
    style Assess fill:#fff9c4,stroke:#fbc02d,stroke-width:2px
    style Orchestrate fill:#ffe0b2,stroke:#f57c00,stroke-width:2px
    style Verify fill:#c8e6c9,stroke:#388e3c,stroke-width:2px
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πŸ”§ Technical Ecosystem

Domain Core Competencies & Tools
GRC & Risk Tools ServiceNow GRC Β· RSA Archer Β· Qualys Β· SailPoint IdentityIQ Β· Jira Β· Confluence
Security Frameworks & Standards NIST CSF 2.0 Β· NIST SP 800-53 Rev. 5 Β· PCI-DSS v4.0 Β· ISO 27001 Β· SOX ITGC Β· FFIEC Β· CIS Controls
Cloud & Infrastructure IAM Β· GuardDuty Β· Security Hub Β· VPC Architecture Β· AWS Lambda Β· CloudTrail Β· AWS Config Β· Azure Policy
Data & Reporting SQL Β· Power BI Β· Microsoft Excel Β· Risk Dashboards Β· KRI/KPI Analysis
DevOps & Engineering Operations CI/CD Pipelines Β· Infrastructure Drift Management Β· GitOps Workflow Implementation

πŸŽ–οΈ Certifications

  • Google Cybersecurity Professional
  • CompTIA Security+ (SY0-701)
  • AWS Certified Solutions Architect – Associate (in progress)

πŸŽ“ Education & Background

MS in Cybersecurity University of Maryland, Baltimore County (UMBC) | NSA Center of Academic Excellence (CAE-R/CD) πŸ“… Aug 2024 - May 2026

B.Tech in Computer Engineering (Honors in Cybersecurity) St. Francis Institute of Technology πŸ“… 2020 - 2024

πŸ“Š Engineering Activity

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πŸ† Trophies

πŸ“« Connect With Me

If you want to discuss multi-cloud automation architectures, zero-trust infrastructure engineering, or SaaS security patterns, reach out via LinkedIn or send an Email.

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  1. guardduty-siem-automation guardduty-siem-automation Public

    Enterprise SIEM with GuardDuty threat detection and automated incident response

    HCL

  2. iam-zero-trust-security iam-zero-trust-security Public

    IAM implementation with Zero Trust security model and automated compliance monitoring

    HCL

  3. secure-vpc-architecture secure-vpc-architecture Public

    Enterprise-grade secure VPC architecture with Zero Trust networking principles

    HCL

  4. control-gap-analyzer control-gap-analyzer Public

    Risk-prioritized control gap analysis for NIST cyber frameworks

    Python

  5. grc-risk-dashboard grc-risk-dashboard Public

    Interactive risk register and KRI dashboard built with SQL and Streamlit

    Python

  6. itgc-evidence-automation itgc-evidence-automation Public

    Automates SOX ITGC evidence collection and CAP generation for access and change management controls

    Python