Senior Active Directory & PKI Engineer


Spring, TX, US

Company:  ExxonMobil


About us


At ExxonMobil, our vision is to lead in energy innovations that advance modern living and a net-zero future. As one of the world’s largest publicly traded energy and chemical companies, we are powered by a unique and diverse workforce fueled by the pride in what we do and what we stand for.


The success of our Upstream, Product Solutions and Low Carbon Solutions businesses is the result of the talent, curiosity and drive of our people. They bring solutions every day to optimize our strategy in energy, chemicals, lubricants and lower-emissions technologies. 


We invite you to bring your ideas to ExxonMobil to help create sustainable solutions that improve quality of life and meet society’s evolving needs. Learn more about our What and our Why and how we can work together.

About Houston


ExxonMobil's state-of-the-art campus north of Houston serves as home to its Upstream, Product Solutions and Low Carbon Solutions businesses and their associated service groups. The facility opened in 2014 and accommodates more than 10,000 employees and visitors.


By bringing many global functional groups together, the campus provides employees with the tools and capabilities needed today, and in the future, to achieve business objectives and accelerate the discovery of new resources, technologies and products. It was designed to foster improved collaboration, creativity and innovation and enhance the company’s ability to attract, develop and retain the top talent in the industry.


The campus is located in Spring, Texas, on 385 wooded acres immediately to the west of Interstate Highway 45 (I-45), at the intersection of I-45 and the Hardy Toll Road, approximately 25 miles from the cultural vibrancy of downtown Houston.
The campus was constructed to the highest standards of energy efficiency and environmental stewardship. Its design incorporates extensive research into best practices in building and workplace design through extensive benchmarking of the world’s top academic, research, and corporate facilities.


Learn more about what we do in Houston here

What role you will play in our team


  • The Active Directory (AD) & Public Key Infrastructure (PKI) team is looking for a new member to join us in Spring, TX
  • In this role, you will work with a product team to help deliver best in class AD Support, Azure AD Support, automation using PowerShell, Public Key Infrastructure and Hardware Security Module (HSM) support, AD Rights Management Service and AD Federation Services, VMWare, and engineering support for ExxonMobil 
  • As a member of the team, you will also collaborate with application developers, business customers, project managers, and other infrastructure teams 
  • This roles requires on-call support and the ideal candidate should have a strong understanding of authentication protocols (e.g. NTLM and especially Kerberos including SPNs, delegation, keytabs, etc.), and be able to troubleshoot any issues related to authentication

What you will do


  • Contribute in architecting complex AD solutions and deliver on time 
  • Support AD Servers (i.e. for AD Domain Services, AD Certificate Services, AD Federations Services, & AD Rights Management Services), server hardware, and virtual machines that are hosting Active Directory core and adjacent services (i.e. includes both the VMWare hosts dedicated for AD services and the virtual machines hosted on the platform)
  • Support Active Directory forests/domains and their Domain Controllers for multiple environments that are hosted on premise and in the cloud (i.e. in both Azure and AWS)
  • Develop automation using modern configuration management tools
  • Automation of DC deployment and activities using Azure Automation (i.e. we use Azure automation services to automate both on premise and in the cloud)
  • Use PowerShell for managing AD, creating scripts, writing automation code, and much more!
  • Use Quest GPO Admin for managing AD Group Policy Objects
  • Employ Infrastructure as code mindset through the full infrastructure lifecycle
  • Participate in the team’s on-call support rotation and frequent troubleshooting calls
  • Maintain system integrity/availability and controls for AD/PKI core services
  • Recover AD/PKI core and adjacent services from unplanned outages as well as define, plan, and implement changes on required infrastructure environment
  • Build and support completely new AD forests and domains
  • Provide end-to-end support for customers and acting as an escalation point for other teams and/or organizations that depend on services provided
  • Develop and maintain technical and troubleshooting skills
  • Use Agile methodologies to quickly adapt to changes in requirements
  • Identify new ways of solving problems that increase efficiency

About you


Skills and Qualifications


  • Bachelor's degree in computer science or a related field
  • Extensive knowledge of Windows Server, Active Directory, Azure, AWS, VMware, PowerShell, and Dell Servers
  • Strong PowerShell skills
  • Demonstrable experience in installing, configuring, monitoring and / or maintaining: 

           1. Windows Servers
           2. Active Directory related services (i.e. ADDS, ADCS, ADRMS, ADFS)
           3. ESXi

  • Working knowledge of software development practices include 

           1. Source control repositories 
           2. API management
           3. Testing
           4. CI\CD

  • Familiarity with Python, JSON, ARM Templates, and Cloud formation templates
  • Interest in DevOps and in how the entire IT process can be improved 

Preferred Qualifications/ Experience


  • Must speak, read, and write English fluently  
  • Able to articulate technical issues to a non-technical audience
  • Able to refine requirements from business end users, update technical design specification documentation 
  • Technical analysis & problem solving skills
  • Act as a mentor for other Active Directory engineers with less experience

Your benefits


An ExxonMobil career is one designed to last. Our commitment to you runs deep: our employees grow personally and professionally, with benefits built on our core categories of health, security, finance, and life.


We offer you: 


  • Pension Plan: Enrollment is automatic and at no cost to you. The basic benefit is a monthly annuity to be paid to you in retirement for the rest of your life 
  • Savings Plan: You can contribute between 6% and 20% of your pay and are encouraged to enroll right away. If you contribute at least 6% to your savings plan, the Company will contribute a 7% match 
  • Workplace Flexibility: We have several programs such as “Flex your Day”, providing ad-hoc flexibility around when and where you work, as well as longer-term programs such as leaves of absence and part-time work
  • Comprehensive medical, dental, and vision plans
  • Culture of Health: Programs and resources to support your wellbeing
  • Employee Health Advisory Program: Provides confidential professional counseling for you and your family, including tools and resources promoting mental health and resiliency at no additional cost to you
  • Disability Plan: Income replacement for when you cannot work due to illness or injury occurring on or off the job. Enrollment is automatic and at no cost to you


More information on our Company’s benefits can be found at


Please note benefits may be changed from time to time without notice, subject to applicable law.

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ExxonMobil is an Equal Opportunity Employer.  All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, age, sexual orientation, gender identity, national origin, citizenship status, protected veteran status, genetic information, or physical or mental disability.


Nothing herein is intended to override the corporate separateness of local entities. Working relationships discussed herein do not necessarily represent a reporting connection, but may reflect a functional guidance, stewardship, or service relationship. 


Exxon Mobil Corporation has numerous affiliates, many with names that include ExxonMobil, Exxon, Esso and Mobil. For convenience and simplicity, those terms and terms like corporation, company, our, we and its are sometimes used as abbreviated references to specific affiliates or affiliate groups. Abbreviated references describing global or regional operational organizations and global or regional business lines are also sometimes used for convenience and simplicity. Similarly, ExxonMobil has business relationships with thousands of customers, suppliers, governments, and others. For convenience and simplicity, words like venture, joint venture, partnership, co-venturer, and partner are used to indicate business relationships involving common activities and interests, and those words may not indicate precise legal relationships.

Nearest Major Market: Houston

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