About FEDLIN
A data security engineering firm for teams that have to prove it.
FEDLIN is principal-led, with vetted specialists brought in by scope. We engineer the access, encryption, and controls behind the data your customers, members, and operators trust you with: we find where they fall short, fix what can be fixed, and document what can't, with evidence a customer review, an auditor, or a board will accept. We build it inside your own systems, so the data stays provably protected and under your control.
Jeremiah spent a decade in identity, security operations, vulnerability management, and GRC inside regulated organizations before founding FEDLIN. He came to AI as a skeptic, and builds with it now because teams shipping it still have to prove the controls underneath hold.
Full background on LinkedInWhere the method comes from
The method comes from a decade inside the security programs of banks, telecoms, healthcare systems, retailers, and a grid operator, where findings arrive faster than they can be fixed and some systems can't be changed at all. That work taught one discipline: find it, fix it, or document why you can't. Every FEDLIN engagement runs on it.
Cryptography is the craft
Every engagement runs on crypto-agility. Cryptographic debt is what accumulates when a company's cryptography goes unmanaged while its obligations don't: post-quantum deadlines for federal contractors, FIPS 140-3 in new procurements, NERC CIP's protection of BES Cyber System Information, PCI DSS 12.3.3, and customer questionnaires asking for a cryptographic inventory. Answering them takes an inventory, a plan, and someone who can engineer against it, which is what PQC Readiness delivers.
Who we're for
SaaS, API, and software companies
An enterprise customer sends a security questionnaire, or SOC 2 readiness asks you to prove the controls. We keep your app, API, and email domain at baseline on a published monthly plan, and when a review asks where your encryption lives, we deliver the inventory and the plan to fix it.
Critical infrastructure and OT
Water utilities working through AWIA, electric utilities under NERC CIP, and OT/ICS operators run control systems and vendor appliances that can't be replaced on schedule. We assess and secure them, remediate where the hardware allows, and document compensating controls where it can't. Vendors to those operators get the controls and evidence behind their supplier answers, including their own access into the operator's network. See OT and water cybersecurity.
Nonprofits and associations
Member, donor, and staff data on a small team. We harden the edge in front of your site, sign-in, and donation pages, carry your email domain toward enforcement, and move shared logins into a password manager, at 25% off every plan.
Firms that hold the client relationship
You hold the client relationship or the contract, and the work needs security engineering behind it. We fix the cryptographic and security findings, document what can't change, and deliver scoped, fixed-price work you can mark up and deliver under your name.
Government contractors and federal subcontractors
Your agency customer is asking for the cryptographic inventory of the systems you run for them, measured against NIST 800-53. We produce that inventory inside your boundary, ahead of the FAR rule.
What we do
Protect
Web Application Security
Your app, API, and email domain kept at baseline in your own account, on a published monthly plan.
Find
PQC Readiness
Where your encryption lives, what's weak, and who owns it, in a report you can hand to a customer or assessor.
Fix
Vulnerability Remediation and GRC Engineering
Your findings backlog closed with evidence, and the control program built around it in the compliance platform you already use.
Build
MCP Security Audit
MCP servers and AI agent access audited inside your own boundary, with audit logging your reviewers accept.
How every engagement runs
Three steps, and each one ends in an artifact you keep.
1. Find
The Findings Report
What is exposed, what is weak, and who owns it, from your app and email domain to your encryption, in a report you hand to a customer or assessor.
2. Fix
Closure Evidence
Each finding is closed under the name your scanner prints. It is retested, and the configuration change and verification output are attached. A finding that cannot change gets a documented treatment and its compensating controls.
3. Evidence
The Risk Register
Every finding ranked, costed, and mapped to the frameworks you answer to, with a recommended treatment and a named owner. It is yours to keep whether or not the work continues with us.
The work behind the method
Engagements the principal has led and delivered, described by type:
- →Weak-cipher, TLS, and Diffie-Hellman findings on legacy grid assets: remediated where the hardware allowed, accepted with compensating controls where it didn't.
- →A penetration-test finding backlog driven to closure, with the controls built out for the client's GRC program.
- →A SOC 2 program underway for an AI-native SaaS platform, with controls engineered and evidence wired in.
- →Edge and email security run for a partner's book of client domains.
- →Data loss prevention policy design in Microsoft 365 and Google Workspace for regulated teams.
- →Access provisioning, recertification, and least-privilege role design across hundreds of wholesale banking applications under PCI DSS.
- →The security and governance review gate for a national retailer's executive initiatives and third-party suppliers.
- →Executive security-posture reporting across tens of thousands of endpoints for a national retailer.
How we work
Who does the work. The person who scopes the work leads it and owns the outcome: the engineering, the evidence, and the handoff. Specialists join by scope, by role: critical infrastructure and OT risk advisory, and QA and evidence engineering. Penetration testing is delivered with vetted specialist partners. Your named owner makes the risk decisions (remediate, mitigate, or accept), and we own the engineering details and the evidence behind each one.
What you can reuse. We explain findings in plain language your team and your own clients can follow. Every fix ships with the exact steps and the command that verifies it, so it can be handed off and repeated.
Where your data lives. Our standard is that what we build lives in infrastructure you own, and every deliverable is yours. We do not put CUI on FEDLIN systems.
FEDLIN is AI-native by method. Frontier coding assistants and language models are part of how the work gets delivered, run under governed, in-boundary controls: the same NIST AI RMF discipline we build for you. We did this work before these tools existed. The tools multiply proven judgment. The judgment came first.
Controls are deployed and running in your environment, and every one produces evidence tied to the requirement it satisfies, so the evidence holds between audit windows. Where your environment can't accommodate governed AI, we work within its limits.
We work directly with clients, or as the engineering arm behind partners, advisors, and primes. Every engagement starts with a scoping call that sets the track.
Media inquiries. Jeremiah Coakley, info@fedlin.com.
FEDLIN protects the data people trust you with.
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