Senior Network Security Engineer

Who we are:


Tria Federal delivers digital services and technology solutions that support the health and safety of veterans, service members and civilians. For two decades, federal agencies have relied on Tria companies to advance their critical missions and modernize their systems, so that they can uphold their commitment to the American people. Today, we are pushing the boundaries of possibility through partnerships and investments in artificial intelligence and emerging technologies, developing solutions for the biggest challenges that government will face tomorrow.


We are proud to employ and support military veterans who bring mission-first mindset, technical expertise, and leadership qualities that strengthen our work. Veterans, transitioning service members, and military spouses are strongly encouraged to apply.

Senior Network Security Engineer


Tria Federal is seeking a Senior Network Security Engineer to support the agency as it moves away from its legacy ForeScout CounterACT NAC/NAM system and adopts Cisco Identity Services Engine (ISE) as the new access‑control platform. The engineer will help configure and manage Cisco ISE across the environment, handling AAA services, wired and wireless 802.1X authentication, device administration, and posture checks for users and devices.


This role also supports the agency’s modernization work by improving authentication processes, updating ISE policies, and strengthening identity-based access controls. The engineer will troubleshoot access issues, refine policy designs, and help ensure users and devices can connect securely and reliably as the organization completes its transition from ForeScout to Cisco ISE.


Basic Requirements

• Senior Network Security Engineer responsible for designing, configuring, monitoring, and troubleshooting Cisco ISE as a NAC/NAM platform, including TACACS+/RADIUS services, device administration policies, and wired/wireless 802.1X authentication.


• Experience working with Cisco ISE deployed on Cisco SNS‑3715 appliances, preferably in a two‑node clustered, high‑availability setup.


• Understanding of ForeScout CounterACT, including legacy NAC/NAM policies, device classification, and access workflows, to support the migration to Cisco ISE.


• Experience providing general wireless network support, including basic troubleshooting, controller interactions, and wireless access workflows.


• Hands‑on experience integrating Cisco ISE with Active Directory (AD) and LDAP, including identity lookups, group‑based policy decisions, and directory‑based authentication.


• Eight (8) years of experience in a large government organization with five (5) years in technical leadership, including four (4) years implementing and troubleshooting Cisco ISE with expertise in:


• Authentication and authorization policies (RADIUS/TACACS+)


• 1X/EAP methods for wireless and wired access


• Device profiling, posture checks, and endpoint compliance


• Certificate‑based authentication (EAP‑TLS) and PKI integration


• AAA integrations for switches, appliances, firewalls, and wireless controllers

• Experience supporting Cisco ISE integrations with Cisco 9800 Wireless LAN Controllers, including guest/registration page redirection and wireless onboarding.


• Experience migrating legacy NAC, RADIUS, or device authentication systems into Cisco ISE while aligning with Zero Trust principles.


• Four (4) years of experience supporting identity‑centric or Zero Trust architectures with strong knowledge of segmentation, certificate management, and endpoint posture controls.


• Solid understanding of telecommunications, network security, and Zero Trust best practices.


• Strong communication skills with the ability to explain Cisco ISE, NAC/NAM, and AAA concepts to both technical and non‑technical audiences.


• Bachelor’s degree in Information Technology, Cybersecurity, or a related field.


• Preferred certifications: Cisco CCNP Security, Cisco ISE Specialist, or similar identity/security certifications.

Responsibilities                              

• Troubleshoot and resolve Cisco ISE issues across RADIUS, TACACS+, 802.1X, device administration, and endpoint authentication.


• Deploy, configure, and maintain Cisco ISE running on two clustered Cisco SNS‑3715 appliances, ensuring high availability and consistent policy enforcement.


• Support the agency’s migration from ForeScout CounterACT to Cisco ISE, including reviewing legacy ForeScout policies, device groups, and access rules and mapping them into ISE policy sets.


• Provide general wireless support, including basic troubleshooting, wireless access workflows, and coordination with wireless infrastructure teams.


• Configure and support Cisco ISE integrations with Cisco 9800 WLCs, including guest/registration portals, wireless onboarding, and policy‑driven access control.


• Integrate and maintain Cisco ISE with Active Directory (AD) and LDAP, including identity lookups, group‑based authorization, and directory‑based authentication workflows.


• Deploy, configure, and maintain Cisco ISE components, including:


• Policy Sets, Authorization Profiles, and Authentication Rules


• TACACS+ device administration


• 1X for wired and wireless networks


• Profiling, posture, and compliance policies


• Certificate‑based authentication and PKI integrations


• Monitor security events using ISE logs, syslog, and performing root cause analysis for authentication and access issues.


• Manage identity integrations, enforce security policies, and tune configurations to support Zero Trust and improve user experience.


• Perform routine health checks, upgrades, migrations, and document changes through SOPs, engineering designs, and implementation procedures.


• Work closely with engineering, operations, and compliance teams while mentoring junior staff and contributing to knowledge sharing efforts.

ABILITY TO OBTAIN A DOL PUBLIC TRUST CLEARANCE (Must be a U.S. Citizen or Green Card Holder residing in the United States for more than 3.5 years  


Work Location: 100% ON-SITE SUPPORT in Suitland, MD 

Why Tria?
What defines the Tria brand is more than just our dedication to excellence in our craft; it’s our incredible team of dedicated, talented, and passionate people that make Tria so exceptional. As people powering possible, we are all partners in our team’s shared success.

As a company that cares about people, we seek to cultivate a culture in which all can thrive personally and professionally. We offer a top-tier benefits package to invest in your physical, mental, and financial health and wellness so that you can be your best self - at work and in life. At Tria, we are growth-minded, entrepreneurial in spirit, and committed to fostering a culture of inclusion and opportunity for all. Whatever your background, your role, your department, or stage in your professional journey, here you will have opportunities to learn new skills, seize new challenges, and advance your career as we grow. 

California Consumer Privacy Act (CCPA)


We are committed to protecting your privacy. As part of our compliance with the California Consumer Privacy Act (CCPA), we want to inform you about how we collect, use, and protect your personal information during the job application process. For more details, please review https://www.oag.ca.gov/privacy/ccpa.

Create a Job Alert

Interested in building your career at Tria Federal? Get future opportunities sent straight to your email.
Create alert

Apply for this job

*

indicates a required field

Autofill with MyGreenhouse

First Name*

Last Name*

Email*

Phone

Country*

Phone*

244 results found
No results found

• 
  
  Afghanistan+93


• 
  
  Åland Islands+358


• 
  
  Albania+355


• 
  
  Algeria+213


• 
  
  American Samoa+1


• 
  
  Andorra+376


• 
  
  Angola+244


• 
  
  Anguilla+1


• 
  
  Antigua & Barbuda+1


• 
  
  Argentina+54


• 
  
  Armenia+374


• 
  
  Aruba+297


• 
  
  Ascension Island+247


• 
  
  Australia+61


• 
  
  Austria+43


• 
  
  Azerbaijan+994


• 
  
  Bahamas+1


• 
  
  Bahrain+973


• 
  
  Bangladesh+880


• 
  
  Barbados+1


• 
  
  Belarus+375


• 
  
  Belgium+32


• 
  
  Belize+501


• 
  
  Benin+229


• 
  
  Bermuda+1


• 
  
  Bhutan+975


• 
  
  Bolivia+591


• 
  
  Bosnia & Herzegovina+387


• 
  
  Botswana+267


• 
  
  Brazil+55


• 
  
  British Indian Ocean Territory+246


• 
  
  British Virgin Islands+1


• 
  
  Brunei+673


• 
  
  Bulgaria+359


• 
  
  Burkina Faso+226


• 
  
  Burundi+257


• 
  
  Cambodia+855


• 
  
  Cameroon+237


• 
  
  Canada+1


• 
  
  Cape Verde+238


• 
  
  Caribbean Netherlands+599


• 
  
  Cayman Islands+1


• 
  
  Central African Republic+236


• 
  
  Chad+235


• 
  
  Chile+56


• 
  
  China+86


• 
  
  Christmas Island+61


• 
  
  Cocos (Keeling) Islands+61


• 
  
  Colombia+57


• 
  
  Comoros+269


• 
  
  Congo - Brazzaville+242


• 
  
  Congo - Kinshasa+243


• 
  
  Cook Islands+682


• 
  
  Costa Rica+506


• 
  
  Côte d’Ivoire+225


• 
  
  Croatia+385


• 
  
  Cuba+53


• 
  
  Curaçao+599


• 
  
  Cyprus+357


• 
  
  Czechia+420


• 
  
  Denmark+45


• 
  
  Djibouti+253


• 
  
  Dominica+1


• 
  
  Dominican Republic+1


• 
  
  Ecuador+593


• 
  
  Egypt+20


• 
  
  El Salvador+503


• 
  
  Equatorial Guinea+240


• 
  
  Eritrea+291


• 
  
  Estonia+372


• 
  
  Eswatini+268


• 
  
  Ethiopia+251


• 
  
  Falkland Islands+500


• 
  
  Faroe Islands+298


• 
  
  Fiji+679


• 
  
  Finland+358


• 
  
  France+33


• 
  
  French Guiana+594


• 
  
  French Polynesia+689


• 
  
  Gabon+241


• 
  
  Gambia+220


• 
  
  Georgia+995


• 
  
  Germany+49


• 
  
  Ghana+233


• 
  
  Gibraltar+350


• 
  
  Greece+30


• 
  
  Greenland+299


• 
  
  Grenada+1


• 
  
  Guadeloupe+590


• 
  
  Guam+1


• 
  
  Guatemala+502


• 
  
  Guernsey+44


• 
  
  Guinea+224


• 
  
  Guinea-Bissau+245


• 
  
  Guyana+592


• 
  
  Haiti+509


• 
  
  Honduras+504


• 
  
  Hong Kong SAR China+852


• 
  
  Hungary+36


• 
  
  Iceland+354


• 
  
  India+91


• 
  
  Indonesia+62


• 
  
  Iran+98


• 
  
  Iraq+964


• 
  
  Ireland+353


• 
  
  Isle of Man+44


• 
  
  Israel+972


• 
  
  Italy+39


• 
  
  Jamaica+1


• 
  
  Japan+81


• 
  
  Jersey+44


• 
  
  Jordan+962


• 
  
  Kazakhstan+7


• 
  
  Kenya+254


• 
  
  Kiribati+686


• 
  
  Kosovo+383


• 
  
  Kuwait+965


• 
  
  Kyrgyzstan+996


• 
  
  Laos+856


• 
  
  Latvia+371


• 
  
  Lebanon+961


• 
  
  Lesotho+266


• 
  
  Liberia+231


• 
  
  Libya+218


• 
  
  Liechtenstein+423


• 
  
  Lithuania+370


• 
  
  Luxembourg+352


• 
  
  Macao SAR China+853


• 
  
  Madagascar+261


• 
  
  Malawi+265


• 
  
  Malaysia+60


• 
  
  Maldives+960


• 
  
  Mali+223


• 
  
  Malta+356


• 
  
  Marshall Islands+692


• 
  
  Martinique+596


• 
  
  Mauritania+222


• 
  
  Mauritius+230


• 
  
  Mayotte+262


• 
  
  Mexico+52


• 
  
  Micronesia+691


• 
  
  Moldova+373


• 
  
  Monaco+377


• 
  
  Mongolia+976


• 
  
  Montenegro+382


• 
  
  Montserrat+1


• 
  
  Morocco+212


• 
  
  Mozambique+258


• 
  
  Myanmar (Burma)+95


• 
  
  Namibia+264


• 
  
  Nauru+674


• 
  
  Nepal+977


• 
  
  Netherlands+31


• 
  
  New Caledonia+687


• 
  
  New Zealand+64


• 
  
  Nicaragua+505


• 
  
  Niger+227


• 
  
  Nigeria+234


• 
  
  Niue+683


• 
  
  Norfolk Island+672


• 
  
  North Korea+850


• 
  
  North Macedonia+389


• 
  
  Northern Mariana Islands+1


• 
  
  Norway+47


• 
  
  Oman+968


• 
  
  Pakistan+92


• 
  
  Palau+680


• 
  
  Palestinian Territories+970


• 
  
  Panama+507


• 
  
  Papua New Guinea+675


• 
  
  Paraguay+595


• 
  
  Peru+51


• 
  
  Philippines+63


• 
  
  Poland+48


• 
  
  Portugal+351


• 
  
  Puerto Rico+1


• 
  
  Qatar+974


• 
  
  Réunion+262


• 
  
  Romania+40


• 
  
  Russia+7


• 
  
  Rwanda+250


• 
  
  Samoa+685


• 
  
  San Marino+378


• 
  
  São Tomé & Príncipe+239


• 
  
  Saudi Arabia+966


• 
  
  Senegal+221


• 
  
  Serbia+381


• 
  
  Seychelles+248


• 
  
  Sierra Leone+232


• 
  
  Singapore+65


• 
  
  Sint Maarten+1


• 
  
  Slovakia+421


• 
  
  Slovenia+386


• 
  
  Solomon Islands+677


• 
  
  Somalia+252


• 
  
  South Africa+27


• 
  
  South Korea+82


• 
  
  South Sudan+211


• 
  
  Spain+34


• 
  
  Sri Lanka+94


• 
  
  St. Barthélemy+590


• 
  
  St. Helena+290


• 
  
  St. Kitts & Nevis+1


• 
  
  St. Lucia+1


• 
  
  St. Martin+590


• 
  
  St. Pierre & Miquelon+508


• 
  
  St. Vincent & Grenadines+1


• 
  
  Sudan+249


• 
  
  Suriname+597


• 
  
  Svalbard & Jan Mayen+47


• 
  
  Sweden+46


• 
  
  Switzerland+41


• 
  
  Syria+963


• 
  
  Taiwan+886


• 
  
  Tajikistan+992


• 
  
  Tanzania+255


• 
  
  Thailand+66


• 
  
  Timor-Leste+670


• 
  
  Togo+228


• 
  
  Tokelau+690


• 
  
  Tonga+676


• 
  
  Trinidad & Tobago+1


• 
  
  Tunisia+216


• 
  
  Turkey+90


• 
  
  Turkmenistan+993


• 
  
  Turks & Caicos Islands+1


• 
  
  Tuvalu+688


• 
  
  U.S. Virgin Islands+1


• 
  
  Uganda+256


• 
  
  Ukraine+380


• 
  
  United Arab Emirates+971


• 
  
  United Kingdom+44


• 
  
  United States+1


• 
  
  Uruguay+598


• 
  
  Uzbekistan+998


• 
  
  Vanuatu+678


• 
  
  Vatican City+39


• 
  
  Venezuela+58


• 
  
  Vietnam+84


• 
  
  Wallis & Futuna+681


• 
  
  Western Sahara+212


• 
  
  Yemen+967


• 
  
  Zambia+260


• 
  
  Zimbabwe+263

Resume/CV*

AttachAttach

Dropbox

Enter manuallyEnter manually

Accepted file types: pdf, doc, docx, txt, rtf

Cover Letter

AttachAttach

Dropbox

Enter manuallyEnter manually

Accepted file types: pdf, doc, docx, txt, rtf

Education

Degree*

Select...

Add another

Will you now or in the future require visa sponsorship? *

Select...

Citizen / Work Status*

Select...

Have you lived in the United States for at least 3 consecutive years within the last 5 years? This is a MUST to qualify for public trust clearance process.*

Select...

Please confirm if you can support this program 100% on-site in Suitland, MD. *

Select...

LinkedIn Profile

What is your earliest start date?

Open to Text Messaging

Select...

Are you currently employed by Tria Federal? (Please select multiple if applicable)

Select...

U.S. Standard Demographic Questions

We invite applicants to share their demographic background. If you choose to complete this survey, your responses may be used to identify areas of improvement in our hiring process.

How would you describe your gender identity?

Select...

How would you describe your racial/ethnic background?

Select...

How would you describe your sexual orientation?

Select...

Do you identify as transgender?

Select...

Do you have a disability or chronic condition (physical, visual, auditory, cognitive, mental, emotional, or other) that substantially limits one or more of your major life activities, including mobility, communication (seeing, hearing, speaking), and learning?

Select...

Are you a veteran or active member of the United States Armed Forces?

Select...

Voluntary Self-Identification


For government reporting purposes, we ask candidates to respond to the below self-identification survey.
Completion of the form is entirely voluntary. Whatever your decision, it will not be considered in the hiring
process or thereafter. Any information that you do provide will be recorded and maintained in a
confidential file.

As set forth in Tria Federal’s Equal Employment Opportunity policy,
we do not discriminate on the basis of any protected group status under any applicable law.

Gender

Select...

Are you Hispanic/Latino?

Select...

Race & Ethnicity Definitions

If you believe you belong to any of the categories of protected veterans listed below, please indicate by making the appropriate selection.
As a government contractor subject to the Vietnam Era Veterans Readjustment Assistance Act (VEVRAA), we request this information in order to measure
the effectiveness of the outreach and positive recruitment efforts we undertake pursuant to VEVRAA. Classification of protected categories
is as follows:



A "disabled veteran" is one of the following: a veteran of the U.S. military, ground, naval or air service who is entitled to compensation (or who but for the receipt of military retired pay would be entitled to compensation) under laws administered by the Secretary of Veterans Affairs; or a person who was discharged or released from active duty because of a service-connected disability.


A "recently separated veteran" means any veteran during the three-year period beginning on the date of such veteran's discharge or release from active duty in the U.S. military, ground, naval, or air service.


An "active duty wartime or campaign badge veteran" means a veteran who served on active duty in the U.S. military, ground, naval or air service during a war, or in a campaign or expedition for which a campaign badge has been authorized under the laws administered by the Department of Defense.


An "Armed forces service medal veteran" means a veteran who, while serving on active duty in the U.S. military, ground, naval or air service, participated in a United States military operation for which an Armed Forces service medal was awarded pursuant to Executive Order 12985.

Veteran Status

Select...

Voluntary Self-Identification of Disability

Form CC-305


Page 1 of 1

OMB Control Number 1250-0005


Expires 04/30/2026

Why are you being asked to complete this form?


We are a federal contractor or subcontractor. The law requires us to provide equal employment opportunity to qualified people with disabilities. We have a goal of having at least 7% of our workers as people with disabilities. The law says we must measure our progress towards this goal. To do this, we must ask applicants and employees if they have a disability or have ever had one. People can become disabled, so we need to ask this question at least every five years.


Completing this form is voluntary, and we hope that you will choose to do so. Your answer is confidential. No one who makes hiring decisions will see it. Your decision to complete the form and your answer will not harm you in any way. If you want to learn more about the law or this form, visit the U.S. Department of Labor’s Office of Federal Contract Compliance Programs (OFCCP) website at www.dol.gov/ofccp.

How do you know if you have a disability?


A disability is a condition that substantially limits one or more of your “major life activities.” If you have or have ever had such a condition, you are a person with a disability. Disabilities include, but are not limited to:

• Alcohol or other substance use disorder (not currently using drugs illegally)


• Autoimmune disorder, for example, lupus, fibromyalgia, rheumatoid arthritis, HIV/AIDS


• Blind or low vision


• Cancer (past or present)


• Cardiovascular or heart disease


• Celiac disease


• Cerebral palsy


• Deaf or serious difficulty hearing


• Diabetes


• Disfigurement, for example, disfigurement caused by burns, wounds, accidents, or congenital disorders


• Epilepsy or other seizure disorder


• Gastrointestinal disorders, for example, Crohn's Disease, irritable bowel syndrome


• Intellectual or developmental disability


• Mental health conditions, for example, depression, bipolar disorder, anxiety disorder, schizophrenia, PTSD


• Missing limbs or partially missing limbs


• Mobility impairment, benefiting from the use of a wheelchair, scooter, walker, leg brace(s) and/or other supports


• Nervous system condition, for example, migraine headaches, Parkinson’s disease, multiple sclerosis (MS)


• Neurodivergence, for example, attention-deficit/hyperactivity disorder (ADHD), autism spectrum disorder, dyslexia, dyspraxia, other learning disabilities


• Partial or complete paralysis (any cause)


• Pulmonary or respiratory conditions, for example, tuberculosis, asthma, emphysema


• Short stature (dwarfism)


• Traumatic brain injury

Disability Status

Select...

PUBLIC BURDEN STATEMENT: According to the Paperwork Reduction Act of 1995 no persons are required to respond to a collection of information unless such collection displays a valid OMB control number. This survey should take about 5 minutes to complete.

By checking this box, I consent to Tria Federal collecting, storing, and processing my responses to the demographic data surveys above.

Submit application