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Description

PKI Engineer to design, implement, and operate enterprise-grade Public Key Infrastructure (PKI) services with a strong focus on Microsoft Active Directory Certificate Services (AD CS) and Active Directory (AD) integration. Handson implementation and integration knowledge of certificate lifecycle management, CA hierarchy governance, enrollment automation, HSM-backed key protection, CA backup restore, migration and integration with platforms such as Windows Server, Linux, network/security devices, cloud providers, MDM/EPP, and zero-trust tooling. Subject matter expert for cryptographic standards, certificate-based authentication, and PKI security controls across the organization.

Required experience:

1. ADCS (Active Directory Certificate Services)

2. Integrate PKI with Active Directory (AD forests/domains, ADCS, AIA/CDP locations, GPOs)

3. Deploy, Configure, Implement, Install,

Architecture & Design

• Design and maintain enterprise PKI architectures (Root CA, Policy CA, Issuing CA) with offline/air gapped roots, secure key ceremonies, key usage, and issuance workflows and robust CRL/OCSP distribution.

• Engineer solutions for mutual TLS, 802.1X (wired/wireless/VPN), device identity, code signing, S/MIME, BitLocker, and disk/volume encryption certs.

• Key sizes, algorithms (RSA, ECC and PQC) encryption and hashing.

• Implement HSM-backed key storage for CAs and code signing; lead key ceremonies, disaster recovery designs.

Operations & Automation

• Own certificate lifecycle management (issuance, renewal, revocation) including automation via Intune, GPO/Autoenrollment, SCEP/NDES, ACME, or MDM connectors.

• Manage CRL/OCSP publication, monitoring, and availability, design highly available, geo-distributed revocation endpoints.

• Implement scripting/automation (PowerShell, APIs) for bulk issuance, inventory, renewal, and drift detection. Enabling separation of duties for secure operation of PKI infrastructure

• CA backup, restore renewal and migration strategy

Security & Compliance

• Apply strong key management practices (FIPS 140-2/140-3), certificate assurance levels, and secure CA hardening baselines.

• Regularly perform PKI risk assessments, access reviews, and control testing (e.g., template permissions, EKU misuse, issuance constraints).

• Lead root cause analysis and incident response for certificate/PKI-related outages or security events.

• Maintain alignment with NIST, CAB Forum, Microsoft Security Baselines, and internal compliance frameworks (e.g., SOX, PCI, HIPAA, ISO 27001) as applicable.

Skills

Pki, ADCS, Certificate Management, Vault Management, Security

Top Skills Details

Pki,ADCS,Certificate Management,Vault Management

Additional Skills & Qualifications

Minimum Qualifications

• 8+ years in Security Engineering/Identity Infrastructure, including 5+ years hands-on with Microsoft AD CS and enterprise Active Directory with managing CA infra

• Proven experience designing, deploying, and operating multi-tier Microsoft PKI (offline root, issuing CAs) in large/complex environments.

• Deep knowledge of X.509, CRL/OCSP, EKU/KU, SANs, key algorithms and sizes (RSA/ECC), hashing (SHA-2), and certificate validation paths.

• Strong PowerShell and Windows Server administration; GPOs, autoenrollment, templates, AIA/CDP configuration.

• Experience with 802.1X/EAP-TLS, TLS/mTLS, VPN auth, and device/user certificate issuance at scale.

• HSM experience (e.g., nCipher/Entrust/Thales) for CA key management.

Experience Level

Expert Level

Job Type & Location

This is a Contract position based out of Chicago, IL.

Pay and Benefits

The pay range for this position is $75.00 - $85.00/hr.

Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following:
• Medical, dental & vision
• Critical Illness, Accident, and Hospital
• 401(k) Retirement Plan – Pre-tax and Roth post-tax contributions available
• Life Insurance (Voluntary Life & AD&D for the employee and dependents)
• Short and long-term disability
• Health Spending Account (HSA)
• Transportation benefits
• Employee Assistance Program
• Time Off/Leave (PTO, Vacation or Sick Leave)

Workplace Type

This is a fully onsite position in Chicago,IL.

Application Deadline

This position is anticipated to close on Jun 30, 2026.

About TEKsystems

We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company.

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

About TEKsystems and TEKsystems Global Services

We’re a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We’re a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We’re strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We’re building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.