Senior Cloud Security & Cryptography Engineer

CACI; United States; On-site; USD 180,000 - 240,000; Full time

Benefits offered by this job

Flexible time off

Learning resources

Job summary

CACI is seeking a Senior Cloud Security & Cryptography Engineer to lead cryptographic solutions in a large-scale cloud environment serving SOCEUR HTAP. You will develop secure KMS-backed services, cryptographic key management, and enterprise security platforms for critical data.

You'll work across cloud APIs, OS, and hardware, architect HSM-backed services, implement TEEs, and ensure TLS 1.3 mutual authentication. A TS/SCI clearance and 8+ years of related experience are required.

Qualifications

• BS in Computer Science or equivalent practical experience in data structures and software security.
• 8+ years of industry experience in software development or cloud infrastructure engineering.
• 5+ years of advanced proficiency in languages such as Python, C, C++, Java, or Go.
• 5+ years' experience designing and developing large-scale, distributed infrastructure or highly secure operating environments.
• 5+ years' experience with cryptographic algorithms, PKI, TLS/SSL, authentication protocols, and threat modeling.
• 3+ years of Google Cloud Identity, OAuth/SAML, Keycloak, and Google Workspace SSO integration.
• At least 3 years of experience in Agile team roles supporting security and cryptographic projects.

Responsibilities

• Build foundational backend services used by Cloud customers and internal systems to secure, rotate, and manage cryptographic keys (e.g., Cloud Key Management Service).
• Work across all layers of the production stack, from high-level Cloud APIs to low-level OS and hardware.
• Architect and scale HSM-backed services to meet enterprise compliance and high availability requirements.
• Design cryptographic and secret management solutions, manage key lifecycles, and handle encryption schemes (e.g., Customer-Managed Encryption Keys or External Key Managers).
• Design and deploy environments like Confidential VMs and TEEs to protect data in use.
• Design robust data-centric security and authentication protocols across global cloud data centers; implement Client-Side Encryption for Google Workspace and mutual TLS 1.3.

Skills

Python

C++

Java

Go

Cloud infrastructure

Cryptography

PKI

TLS/SSL

Education

BS in Computer Science

Tools

Terraform

GCP

KMS

HSM

Job description

Job Title: Senior Cloud Security & Cryptography Engineer

Job Category: Engineering

Time Type: Full time

Minimum Clearance Required to Start: TS/SCI

Employee Type: Regular

Percentage of Travel Required: Up to 10%

Type of Travel: Outside Continental US

Anticipated Posting End: 11/30/2026

The Opportunity:

As a Cloud Cryptographic/Key Management Engineer you will develop solutions to operate in a large-scale infrastructure cloud environment securely supporting Special Operations Command Europe (SOCEUR) Hybrid Threat Action Platform (HTAP). These solutions will facilitate the deployment of software-defined networking, advanced security controls, and cryptographic capabilities to enable cloud usage to be flexible and highly secure. This position will ensure their solutions meet the highest cryptographic standards. Specialize in cryptographic solutions, key management, and enterprise security platforms for critical data security services. You will engineer and develop solutions supporting web and mobile applications, machine learning, and big data, with a strong emphasis on cryptographic integrity and security.

Responsibilities :

• Build foundational backend services used by Cloud customers and internal Google systems to secure, rotate, and manage cryptographic keys (e.g., Cloud Key Management Service).
• Work across all layers of the production stack, from high-level, customer-facing Cloud APIs down to low-level operating systems and physical hardware.
• Architect and scale HSM (Hardware Security Module) backed services to meet strict enterprise compliance and high-availability requirements.
• Design cryptographic and secret management solutions, manage key lifecycles, and handle encryption schemes (e.g., Customer-Managed Encryption Keys or External Key Managers).
• Design and deploy environments like Confidential VMs and Trusted Execution Environments (TEEs) to protect data while it is in use.
• Design robust, reliable data-centric security and authentication protocols across global, hyper-scale cloud data centers. Implement Client-Side Encryption (CSE) for Google Workspace and ensure mutually authenticated TLS 1.3 communications.

Qualifications :

Required:

• Active Top Secret/SCI
• BS in Computer Science, or equivalent practical experience in data structures and software security.
• 8+ years of industry experience in software development or cloud infrastructure engineering.
• 5+ years of advanced proficiency in general-purpose languages like Python, C, C++, Java, or Go.
• 5+ years' experience designing and developing large-scale, distributed infrastructure or highly secure operating environments.
• 5+ years' experience with cryptographic algorithms, Public Key Infrastructure (PKI), TLS/SSL, authentication protocols, and threat modeling.
• 3+ years of Google Cloud Identity, OAuth/SAML, Keycloak, and Google Workspace SSO integration.
• At least 3 years of experience in Agile team roles supporting security and cryptographic projects

Desired :

• GCP Professional Cloud Security Engineer certification
• GIAC Python & Cryptography (GPCS / GCIP) certification
• CCSP (Certified Cloud Security Professional) certification
• CISA (Certified Information Systems Auditor) certification.
• 4+ years of experience implementing scalable cloud applications and platform services utilizing cryptographic controls
• 4+ years of experience using Terraform to codify security and cryptographic infrastructure configurations
• 4+ years of network or operating system administrative experience focused on security hardening.
• FIPS 140-2/3 validation processes and managing keys in a multi-level security environment, including policies for key generation and rotation.

What You Can Expect:

• A culture of integrity.
• At CACI, we place character and innovation at the center of everything we do. As a valued team member, you'll be part of a high-performing group dedicated to our customer's missions and driven by a higher purpose - to ensure the safety of our nation.
• An environment of trust.
• CACI values the unique contributions that every employee brings to our company and our customers - every day. You'll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.
• A focus on continuous growth.
• Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground - in your career and in our legacy.

Pay Range :

There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opp