Legacy App Modernization in Austin for Government, Semiconductor and Enterprise

ZTABS modernizes legacy applications for Austin enterprises and Texas state agencies. Austin's government agencies operate legacy licensing and permitting systems built on COBOL and mainframe platforms. Semiconductor manufacturers maintain legacy MES systems. Growing enterprises run ERP systems needing modernization. ZTABS is remote-first by design from our Houston, Texas office.

Austin's legacy modernization demand spans state agency systems that cannot support modern citizen services, semiconductor MES platforms approaching vendor end-of-support, ERP systems needing cloud migration with business rule preservation, and healthcare applications requiring modern integration.

Legacy app modernization in Austin at a glance

Need	What we build	Key requirement
Government	Licensing and permitting	TXRAMP, citizen UX
Semiconductor	MES modernization	Recipe management, yield
Enterprise	ERP migration	Business rules, accounting
Healthcare	EHR integration	HIPAA, clinical workflow
Technology	Platform modernization	Scaling, team autonomy

Texas state agency modernization

Texas state agencies in Austin operate legacy systems for professional licensing, regulatory permitting, case management and citizen services. Systems built on COBOL, NATURAL, mainframe platforms and early client-server architectures.

Licensing system modernization. Legacy professional licensing systems replaced with modern platforms supporting online application, automated verification, electronic payment and real-time status tracking. Business rules governing licence eligibility, renewal requirements, disciplinary actions and continuing education extracted from legacy code and validated with agency staff.

Permitting system modernization. Legacy permitting systems replaced with modern platforms enabling online submission, automated review routing, electronic plan review and inspection scheduling. Historical permit records migrated with full application and inspection history.

Case management. Legacy case management systems modernized for investigative, enforcement and compliance functions. Case history, documentation and evidence records migrated with chain-of-custody integrity.

TXRAMP alignment. TXRAMP applies to defined cloud offering scope for Texas state agency procurement including state agencies, higher education and public community colleges. TXRAMP is a state risk and authorisation management programme for cloud services, not a universal Texas application or consultancy certification. Cloud modernization targets aligned with TXRAMP requirements where the offering is in scope.

Semiconductor MES modernization

Austin semiconductor manufacturers operate legacy MES systems for recipe management, lot tracking, equipment integration and yield analysis.

Recipe management. Legacy recipe management systems modernized for version-controlled recipe distribution, equipment-specific parameter management and real-time recipe verification. Historical recipe data and run logs preserved.

Lot tracking. Legacy lot tracking modernized with real-time WIP visibility, genealogy tracking and automated hold management. Manufacturing history migrated with full lot genealogy and process records.

Equipment integration. Legacy SECS/GEM interfaces modernized for current equipment communication standards. OPC UA connectivity enabling cloud analytics where appropriate. Equipment writes and recipe distribution require actual engineering authority, approved test envelope and independent interlocks, not cloud connectivity alone implying approved control. Equipment state tracking and alarm management modernized.

Yield analytics. Legacy yield analysis tools replaced with modern platforms supporting real-time statistical process control, defect Pareto analysis and wafer maps. Historical yield data migrated for trend analysis and process improvement.

ERP migration

Austin enterprises running legacy ERP systems need cloud migration with complete business rule preservation and accounting reconciliation.

Business rule documentation. ERP business rules including pricing logic, approval workflows, accounting treatments, tax calculations and intercompany transactions documented and validated with actual business rule owners. Not IT assumptions about what the rules should be.

Accounting reconciliation. Trial balance reconciliation before and after migration. Subledger to general ledger reconciliation. Open transaction migration with aging verification. Fixed asset registers with depreciation schedule continuity. Accounting period boundary verified.

Integration rebuilding. Legacy EDI, file-based and API integrations rebuilt for modern ERP platform. Each integration tested with actual trading partners during parallel operation.

Chart of accounts alignment. Legacy chart of accounts mapped to modern ERP structure. Historical reporting continuity maintained. Budget and planning data migrated with allocation methodology preservation.

TDPSA compliance

TDPSA scope. TDPSA applies to consumer individual or household data. Employment and commercial data exclusions apply. Not a processing-volume threshold. Main applicability excludes SBA-small businesses except Section 541.107 limited sensitive-data sale consent, not broad applicability to every Texas business.

Healthcare application modernization

Austin healthcare providers maintain departmental applications needing EHR integration.

Departmental replacement. Legacy lab, pharmacy and scheduling systems replaced with EHR-integrated solutions. Patient data migrated with HIPAA-compliant handling. Clinical workflow continuity maintained.

Telemedicine platforms. Legacy telemedicine systems modernized for current video technology, EHR integration and patient portal access.

Modernization methodology

Application archaeology. Reverse-engineering business rules from legacy code. Government systems often have thousands of business rules accumulated over decades of legislative changes. Each rule documented, validated and categorised. COBOL analysis combined with SME interviews captures institutional knowledge.

Seam selection. Identifying natural boundaries for strangler fig extraction. Government systems: citizen-facing services, internal processing, reporting and integration. ERP: financial, procurement, HR and payroll modules.

Data migration with reconciliation. Automated migration with row-count verification, aggregate validation and sample record comparison. Government licensing data verified against official records. ERP financial data reconciled against trial balance. Legacy preserved in read-only mode.

Parallel operation. Modern system runs alongside legacy for validation. Government agencies typically require extended parallel periods due to legislative and regulatory validation requirements.

Strangler fig coexistence

Single authoritative write for each object and period. Government licensing: which system is the system of record for licence status during coexistence. ERP: which system posts journal entries during parallel operation. Dual-write only with engineered CDC design including versioning, conflict detection and reconciliation.

Idempotency keys enforced by receiving side. Finite retries with DLQ. Unknown outcomes require reconciliation before replay. Government payment processing and ERP journal entries particularly sensitive to duplicate transactions.

Regression and testing

Representative business-critical paths: licence application lifecycle, permitting workflow, ERP financial close, manufacturing lot lifecycle. Meaningful integration, performance and manual UAT with domain expert approval. Government testing includes legislative compliance verification.

Cost and timeline

Legacy system modernization follows the published cost guide.

Tier	Range	Timeline	Example
UI Modernization	$40K to $100K	8 to 16 weeks	New frontend, API wrapper, improved UX
Re-Platforming	$100K to $250K	16 to 32 weeks	Modern stack, containerization, cloud, data migration
Re-Architecture	$250K to $400K	8 to 14 months	Decompose monolith, event-driven, modern data layer
Full Rebuild	$400K to $500K+	12 to 18+ months	Ground-up rebuild with agreed availability target, rehearsed staged cutover and maintenance windows

Vendor comparison

These 2026 US-buyer planning ranges illustrate re-platforming a 10 to 15 year old business-critical system using a strangler fig approach, modern stack, API wrappers, phased data migration and regression harness. They are guide-based illustrations, not empirical market surveys or independent local quotes.

Vendor route	Typical cost	Timeline
Freelance or dev collective	$40K to $130K	5 to 12 months
Offshore systems integrator	$60K to $200K	8 to 14 months
ZTABS	$100K to $280K	6 to 12 months
Large consultancy	$300K to $1M+	10 to 18 months
SaaS replacement (where a vendor fits)	$50K to $200K implementation	4 to 9 months

The published guide estimates that parallel-running infrastructure, knowledge-transfer time from senior staff and where applicable compliance revalidation combined add $100K to $500K or more as a scope-dependent planning allowance regardless of vendor path. Not every project requires all categories, and actual costs depend on parallel-run duration, revalidation scope and whether infrastructure is shared. Selected licences, vendor contracts, data cleansing, dual-run support and revalidation boundaries apply per engagement scope.

Proposal evaluation criteria

Use these criteria when evaluating any vendor proposal for this engagement, including ZTABS:

Criterion	What to verify
Strategy, deliverables and acceptance	Agreed modernization approach with keep, upgrade, configure or replace alternatives for each system and documented acceptance criteria
Data source-of-truth and reconciliation	Which system is authoritative for each object and period, CDC and reconciliation design evidence, data ownership boundaries
Rehearsal, cutover and rollback	Phased rehearsal with actual maintenance windows, rollback feasibility after new writes and schema changes, record and control validation with approved RTO and RPO
Security, privacy and compliance	Access, safety and compliance evidence during and after migration, exception register with owner acceptance, residual risk documentation
Full recurring costs	Licences, parallel-run infrastructure, third-party vendor, support, data cleansing and revalidation costs separately itemised
Human roles and responsibility	Trainer, validator and support responsibility split, agreed staff languages, documentation, review, translation and onsite terms

Modernization approach selection

Austin enterprises need clear criteria for choosing between approaches.

Targeted remediation. Patching specific pain points in an otherwise functional system. Example: adding online application capability to a legacy licensing system while keeping the core processing engine.

Re-platforming. Moving to modern infrastructure while preserving logic. Example: migrating legacy licensing system from mainframe to cloud while preserving COBOL business rules rewritten in modern code.

Re-architecture. Decomposing monolith into services. Example: extracting licence application processing, renewal management and enforcement as independent services from a monolithic agency system.

Full rebuild. Ground-up development for systems where legacy code is unmaintainable. Example: replacing a 30-year-old COBOL system where the code cannot be analysed due to decades of undocumented modifications.

SaaS replacement. Replacing custom systems with commercial products. Example: replacing custom ERP with cloud ERP. Low build risk but high fit risk for custom government workflows and state-specific business rules.

Cutover rehearsal

Observable acceptance with measurable RTO, RPO and latency targets. Government cutover typically timed for fiscal year boundaries or legislative session intervals. ERP cutover timed for accounting period boundaries with trial balance reconciliation. Semiconductor cutover timed for production lot boundaries.

Rollback feasibility assessed after schema, data and contract changes. Government licensing status changes and ERP journal entries may not be automatically reversible. Compensations can require administrative, legal or accounting review.

How delivery works

ZTABS is remote-first by design from our Houston, Texas office. Central time aligned with Austin operations.

When ZTABS is not the right fit

These describe the boundaries of this proposed modernization engagement, not company-wide limitations.

• The system still works and nobody is asking for changes. Wait for a real forcing function.
• SAP or Oracle ERP full implementation. Licensed partner scope. A separately scoped assessment or integration engagement may apply.
• On-site embedded team at state facility. ZTABS is remote-first by design with a Houston office. If the engagement requires permanent on-site staff, a separately scoped arrangement would apply.
• TXRAMP or TDPSA legal advisory. This engagement builds platforms, not regulatory advice. Regulatory advisory is a separately scoped professional service.

White-label AI products

ZTABS builds custom white-label AI products for clients to brand and resell. Austin technology companies can commission white-label AI platforms for distribution under their own brand.

Data type mapping

Government and enterprise data has unique types requiring careful migration planning. Licence numbers with status history, renewal cycles, disciplinary actions and continuing education credits. Permit numbers with application history, review comments, inspection results and compliance conditions. ERP chart of accounts with hierarchical structure, segment values and cross-validation rules. Semiconductor wafer and lot identifiers with process step history, measurement data and equipment associations.

Handover

Modernization handover includes runbooks, data lineage, licensing, support contacts and accountable owners. Government handover includes statute and administrative code references for each business rule, agency staff contact assignments and legislative session coordination notes. ERP handover includes chart of accounts mapping, integration partner contacts and accounting period documentation. Semiconductor handover includes recipe management procedures, equipment integration specifications and yield analysis tool configuration.

Regression and testing detail

Government licensing: application submission through approval, renewal processing, disciplinary action workflow, continuing education verification, public lookup. ERP: purchase order through payment, journal entry through financial close, fixed asset lifecycle, intercompany transaction reconciliation. Semiconductor: lot creation through shipment, recipe distribution, SPC chart processing, equipment qualification. Meaningful UAT with domain expert approval for each system. Government testing includes legislative compliance verification with current statute references. ERP testing includes financial reconciliation against known good totals. Semiconductor testing includes yield verification against historical baselines and equipment qualification procedures. Load testing verifies performance under production transaction volumes.

Inventory and discovery

Austin enterprise modernization begins with complete inventory: applications, users, scheduled jobs, database procedures, reports, file and EDI dependencies, vendor contracts, supported versus end-of-life versions. Texas state agencies commonly have legacy systems accumulated over decades of legislative sessions with hundreds of business rules encoded in code nobody fully understands.

Business rules discovered with users through representative transaction analysis. Government licensing rules validated against current statute and administrative code. ERP business rules validated with actual business process owners. Semiconductor manufacturing rules validated against production engineering specifications.

Integration and dependency management

Government integrations. State agencies integrate with federal systems, other state agencies, professional boards and payment processors. Each integration documented and migration path coordinated with external parties.

ERP integrations. Legacy EDI, file-based and API integrations with customers, suppliers, banks and tax authorities. Each integration tested with actual partners during parallel operation.

Semiconductor integrations. Equipment communication protocols, recipe distribution systems, yield analysis tools and supply chain connections. OPC UA and SECS/GEM standard interfaces maintained.

Authentication versus authorisation. Authentication identity distinct from role-based, agency-level and programme-level authorisation. Government systems require strict separation of duties and audit trail for authorisation changes.

Logs and retention

Logs minimise and redact secrets and regulated payloads with actual retention and legal holds. Government records retained per Texas State Library and Archives Commission requirements. ERP financial records retained per tax and audit requirements.

Risks and mitigations

Legislative changes during migration. Government modernization must accommodate legislative changes. Modular architecture enables rule updates without full system redesign.

Business rule gaps. Application archaeology combined with parallel operation catches undiscovered rules.

Accounting discrepancies. ERP migration with trial balance reconciliation at every checkpoint. No financial cutover without accounting team approval.