Selected Work

What we've shipped — anonymized but verifiable.

Eighteen representative engagements across our six service pillars. Names anonymized; outcomes verifiable on request under NDA. References available after the second conversation.

Software Engineering

HealthcareJavaFHIR

FHIR-native patient record platform — regional health network

Outcome
Patient record reconciliation 30+ min → 4 sec. CMS payer compliance shipped 6 months ahead of mandate. Full case study →
Finance.NETEvent Sourcing

Audit-grade transaction ledger — mid-size commercial bank

Outcome
Year-end audit time 6 weeks → 8 days. Fraud rules now ship as event-stream consumers. Full case study →
TelecomgRPC10⁹/day

Real-time billing rating engine — Tier-1 mobile carrier

Outcome
Per-second rating at 10⁹ events/day. Customer usage view refreshed in <3 sec. Full case study →

DevOps & SRE

HealthcareHIPAAK8s

HIPAA-compliant K8s migration — Fortune 500 health system

Outcome
Deploy time 4hr → 12min. Audit findings cleared. PHI access auditing answers compliance queries in seconds. Full case study →
FinancePCI DSSMulti-region

Real-time fraud platform — Tier-1 payments processor

Outcome
99.99% availability four quarters running. Holiday freeze eliminated. PCI audit time cut from 4 weeks to 9 days. Full case study →
Telecom5G CoreSOC

OSS observability rebuild — global Tier-1 telecom operator

Outcome
Pages-per-day 40k → ~80, all actionable. MTTD dropped 67%. Three quarters of zero customer-impacting outages. Full case study →

Artificial Intelligence

HealthcareRAGOn-prem LLM

Clinician documentation assistant — large medical group

Outcome
Documentation time 2hr → 35 min/day per physician. 87% draft acceptance. Full case study →
FinancePredictive ML

Real-time fraud scoring — Tier-1 payments processor

Outcome
Fraud loss reduction 31% in first quarter. P99 scoring latency 8ms. Full case study →
TelecomNLP

Customer-care intent classification — Tier-1 mobile operator

Outcome
Mis-routing 22% → 6%. Avg handle-time down 18%. Annual savings: $11M. Full case study →

Cloud & CRM

FinanceGCP

On-prem-to-GCP data warehouse migration — global asset manager

Outcome
Quarterly close 18hr → 3hr. Cost down 41%. Migration completed without a single rollback. Full case study →
HealthcareSalesforce

Salesforce ↔ EHR integration — multi-state hospital network

Outcome
Outreach errors 4.2% → 0.1%. HIPAA audit cleared with the integration as a documented control. Full case study →
TelecomCRM

Salesforce-driven contract lifecycle for B2B telecom — Tier-1 carrier

Outcome
Sales cycle 9mo → 6mo. Apex codebase down 38%. Annual integration cloud spend reduced $2.4M. Full case study →

Management & Strategy

HealthcareProgram rescue

EHR migration program rescue — multi-hospital network

Outcome
Migration shipped 4 months past original — 5 months earlier than the trajectory we inherited. Sponsor still in role. Zero attrition. Full case study →
FinanceOKR rollout

Engineering OKR rollout — global investment bank technology division

Outcome
87% of teams referencing OKRs weekly within 9 months. Three multi-million-dollar program risks surfaced. Framework still in use 3 years later. Full case study →
Telecom5G core program

5G core launch program — Tier-1 mobile operator

Outcome
5G core launched 6 days before regulatory deadline. Zero customer-impacting incidents in launch week. Full case study →

Security & Compliance

HealthcareHITRUST

HITRUST CSF certification — Series-C digital health platform

Outcome
HITRUST CSF r2 certification in 9 months (internal estimate had been 14). ~$8M ARR unblocked. Renewal audits now 2 weeks. Full case study →
FinancePCI DSS 4.0

PCI scope reduction — Tier-1 payments processor

Outcome
CDE scope: 60% → 8% of estate. PCI DSS 4.0 audit cleared with zero findings. Engineering velocity outside CDE doubled. Full case study →
TelecomSIEM

SIEM migration + detection-engineering rebuild — Tier-1 carrier SOC

Outcome
Alerts/day 80k → 1.4k, all actionable. MTTD dropped 71%. Two real APT-class incidents detected post-migration that the legacy SIEM had been missing. Full case study →

Want references for any of these?

Direct introductions to executive sponsors of past engagements — under NDA, after the second conversation.

info@core923group.com → Contact form