Zero Trust Network Access (ZTNA) – Consultancy Work Package

1. Executive Summary

This work package provides a structured consultancy engagement to design, implement, and operationalise a Zero Trust Network Access (ZTNA) capability. ZTNA replaces traditional perimeter‑based VPN models with identity‑centric, context‑aware access controls that continuously verify trust. The engagement ensures secure, granular, and adaptive access to applications, data, and services across hybrid and cloud environments.

The outcome is a modern, resilient access architecture aligned with Zero Trust principles, regulatory expectations, and organisational risk appetite.

2. Engagement Objectives

• Replace or augment legacy VPN with a modern ZTNA solution.

• Enforce least‑privilege, identity‑driven access to applications and data.

• Reduce attack surface by eliminating implicit trust and lateral movement.

• Strengthen security posture through continuous verification and adaptive policies.

• Improve user experience with seamless, secure, context‑aware access.

• Align with Zero Trust frameworks (NIST 800‑207, CISA, Microsoft Zero Trust).

3. Scope of Work

3.1 Phase 1 – Discovery & Current‑State Assessment

Activities

• Stakeholder interviews (security, IT, cloud, operations).

• Review of current remote access architecture (VPN, firewalls, IAM, MFA).

• Assessment of identity maturity (Azure AD/Entra ID, Okta, Ping, etc.).

• Application and data access mapping (on‑prem, cloud, SaaS).

• Gap analysis against Zero Trust principles and regulatory requirements.

Deliverables

• Current‑state assessment report

• Identity & access maturity heatmap

• Application access inventory

• Gap and risk register

3.2 Phase 2 – ZTNA Target Architecture & Strategy

Activities

• Define ZTNA vision, scope, and success criteria.

• Develop ZTNA architecture (identity, device, network, application layers).

• Select ZTNA model:

  • Agent‑based

  • Agentless

  • Cloud‑delivered

  • Hybrid

• Define policy model: identity, device posture, location, risk signals.

• Integration design with SIEM, SOAR, IAM, EDR/XDR, and MDM/UEM.

Deliverables

• ZTNA target architecture blueprint

• Policy and trust model

• Integration and data‑flow diagrams

• Technology selection recommendations

3.3 Phase 3 – Solution Design & Implementation Planning

Activities

• Detailed design of ZTNA components:

  • Identity provider integration

  • Device posture checks

  • Application segmentation

  • Conditional access policies

  • Micro‑tunnels and per‑app access

• Define onboarding strategy for users, devices, and applications.

• Develop migration plan from legacy VPN.

• Create test plan and acceptance criteria.

Deliverables

• Detailed ZTNA design pack

• Migration & onboarding plan

• Test and validation plan

• Implementation roadmap

3.4 Phase 4 – Build, Configuration & Deployment

Activities

• Deploy ZTNA platform (cloud or hybrid).

• Configure identity, device, and application access policies.

• Integrate with SIEM/SOAR for monitoring and automated response.

• Configure logging, analytics, and risk‑based access controls.

• Pilot deployment with selected user groups.

• Full rollout across the organisation.

Deliverables

• Configured ZTNA platform

• Policy library (identity, device, application)

• Pilot report and optimisation actions

• Full deployment report

3.5 Phase 5 – Operationalisation & Workforce Enablement

Activities

• Develop Standard Operating Procedures (SOPs).

• Create runbooks for access requests, exceptions, and troubleshooting.

• Train IT, security teams, and service desk.

• Conduct user awareness sessions.

• Establish monitoring dashboards and alerting thresholds.

Deliverables

• SOPs and operational runbooks

• Training materials and knowledge transfer

• Monitoring dashboards

• Operational readiness assessment

3.6 Phase 6 – Optimisation, Governance & Continuous Improvement

Activities

• Post‑implementation review and fine‑tuning.

• Establish governance model for policy lifecycle management.

• Define continuous improvement cycles and maturity roadmap.

• Optional: ongoing managed ZTNA service.

Deliverables

• ZTNA optimisation report

• Governance and policy lifecycle framework

• 12–24 month maturity roadmap

• Optional managed service proposal

4. Project Governance

4.1 Roles & Responsibilities

(Role) (Responsibilities)

Executive Sponsor Strategic oversight

ZTNA Programme Lead Delivery management

Identity Architect IAM and policy design

Network/Security Architect ZTNA architecture and integration

Consultants Advisory, design, implementation

Service Desk Lead Operational readiness

5. Timeline & Milestones

Typical ZTNA programmes run 10–16 weeks, depending on complexity

Discovery 1–2 weeks Assessment complete

Architecture 2–3 weeks Blueprint approved

Design 2–3 weeks Detailed design signed off

Build & Deployment 4–6 weeks ZTNA live

Operationalisation 1–2 weeks SOPs & training complete

Optimisation 1 week Final review

6. Deliverables Summary

• ZTNA architecture & strategy

• Detailed design pack

• Configured ZTNA platform

• Policy library & governance model

• SOPs, runbooks, training

• Maturity roadmap

7. Value Proposition

This ZTNA work package delivers:

• Identity‑centric security that eliminates implicit trust

• Reduced attack surface through micro‑segmentation and per‑app access

• Improved user experience with seamless, adaptive access

• Regulatory alignment with Zero Trust and modern security frameworks

• Future‑proof architecture ready for cloud, hybrid, and remote‑first models

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