Senior Level 3 Support Engineer - Infra, Security & On-Call
FeatherShark
FeatherShark is seeking a Level 3 Support Engineer to join our in-person team at the Chesterfield, MO office. You will own complex infrastructure issues, including servers, routing, firewalls, VPNs, and security incidents, while automating tasks with PowerShell and Python. You will maintain the knowledge base, help set technology standards, and mentor Level 1 technicians. This role emphasizes top‑tier customer service and on‑call responsibilities. #J-18808-Ljbffr FeatherShark
$80k - $90k
...FeatherShark is looking for a Level 3 Support Engineer to join our growing team!... ...infrastructure, networking, and security troubleshooting we have, and... ...Take your turn in our on-call rotation To qualify for consideration... ..., with at least 2 at a senior or escalation level. MSP or...Level 3Temporary workWork at office- ...Windows OS, web servers, and virtualization technologies. The position focuses on performance optimization, troubleshooting, and providing advanced support. Ideal candidates will also have a strong background in network security and Microsoft SQL Server. #J-18808-Ljbffr KCSSenior
- Gateway Studios LLC is seeking an experienced Audio Technician Level 3 to lead complex live sound and studio projects. You will oversee planning, setup, signal routing, and on‑site supervision of junior staff, ensuring flawless audio quality across events. The role emphasizes...SeniorLevel 3
- BJC HealthCare is seeking an RNFA to perform an expanded perioperative role as a first assistant in the operating room. The RNFA works with surgeons and the perioperative team to provide direct patient care. Requires RN with CNOR and a Bachelor's in Nursing, with 2-5 years...Senior
- Barnes-Jewish Hospital in Sunset Hills, MO seeks a Senior RNFA for its outpatient surgery center opening 10/9/2026. The role supports surgeons as the first assistant, performing intraoperative tasks and contributing to a safe, efficient perioperative environment. The position...Senior
$80k - $110k
...Project / Senior Engineer Location: Chesterfield, MO (Hybrid Work Schedule... ...) | Professional Development Support Represented By: Luxus Group |... ...recommendations Senior-Level (Leadership Responsibilities)... ...Project Engineer Level: 3–7 years of relevant experience...SeniorLevel 3Work at officeRemote work- ...Works Mechanisms Design Engineer (Senior or Experienced)Company... ...Design Engineer to support a Next Generation Cruise... ...emphasis on safety, security and reliability. The program... ...and Experience):(Level 4): 9 or more years' related... ...pay range:Level 3: $103,700 - $140,300Level...SeniorLevel 3Permanent employmentFull timeWork experience placementImmediate startRelocationVisa sponsorshipWork visaFlexible hoursShift work
$112.2k - $151.8k
Avionics Power Systems Engineer, Experienced or Senior LevelCompany:The... ...Provide production build support including build... ...ability to obtain a U.S. Security Clearance for which the... ...work statementLevel 3: typically 5 or more... ...equivalent qualifications.Level 3: Minimum 3 years of...SeniorLevel 3Permanent employmentFull timeWork experience placementInterim roleRelocationVisa sponsorshipWork visaFlexible hoursShift workDay shift- Structural Design Engineer - Experienced/SeniorCompany:... ...the St. Louis region and support current and emerging... ...Boeing Defense Space and Security (BDS). Positions will... ...Position Responsibilities:Level 3Develop, integrate and... ...Sciences)Level 3: 5 or more years' related...SeniorLevel 3Full timeWork experience placementInterim roleImmediate startRelocationVisa sponsorshipWork visaFlexible hoursShift workWeekend workAfternoon shift
$110k - $155k
Turnberry Solutions is seeking a Senior IT System Administrator to join the Data Strategy and Intelligence practice. The role centers... ...Oracle Cloud with 100% remote work. You will lead automation, security, and governance, develop IaC with Terraform and ARM templates,...SeniorRemote workFlexible hours- ...initiatives and partner with cross-functional teams to deliver secure, scalable technology solutions. The role emphasizes... ...improvement, with responsibility for upgrades, DR planning, on-call support, and collaboration with help desk and #J-18808-Ljbffr ConceroSenior
$115.8k - $202.7k
...can make your mark as a Senior Enterprise Architect at... ...and influencing senior level management and key... ...or enterprise architect supporting a large insurance or brokerage... ...Within your first 3-12 months you will evaluate... ..., quality assurance, security, and service on-...SeniorMinimum wageLocal areaRemote workNight shift- ...System is hiring a Full-Time Senior MRI Advanced Modality... ...Position Details: NO CALL or Weekends!!! Day Shift... ...equivalency (or higher level of education) 2 years’ experience... ...School of Medicine, supported by a house staff of... ...Technologist must have 3 or more responsibilities...SeniorFull timeLocal areaMonday to FridayFlexible hoursWeekend workDay shift
- ...We are seeking a Mainframe Support Engineer to provide L2/L3 production support for enterprise mainframe applications. The ideal candidate will... ...monitoring and operational support tools. Ability to support after-hours or on-call production activities when required....
- ...Primary Stroke Center, a Level II Time Critical Diagnosis... ...a Bronze Standard, Level 3 Geriatric Emergency Department... ...who thrive in a supportive and flexible environment. Call Schedule: 2 weekday nights... ...and virtual care services, senior care, comprehensive home care...Level 3Local areaFlexible hoursNight shiftWeekend workWeekday work
- Mutual of Omaha Mortgage is seeking a proactive Senior Loan Officer in Missouri to listen, understand, and analyze clients’ financial situations... ...persuasive communication, closing deals, and managing high call volumes with diligent follow-up. #J-18808-Ljbffr Mutual of...Senior
$35 per hour
Geeks on Site is seeking an On-Call IT Field Technician for local, onsite support. This independent contractor role allows you the flexibility to accept jobs based on your availability, earning $35 per hour for time spent on-site. Your responsibilities include troubleshooting...Hourly payFor contractorsLocal area$35 per hour
Overview On-Call IT Field Technician - PC, Mac, POS and TV Mounting Location: Multiple U.S. Cities (Local, Onsite Support) Job Type: Independent Contractor (1099) Pay: $35 hour (on-site) Schedule: Flexible - You accept jobs based on your availability This is an on...Hourly payFor contractorsLocal areaRemote workFlexible hours- ...perform physical stability analyses, and operate lab scale mixing and milling equipment. Candidates should have bachelor-level chemistry knowledge, 1-3 years of relevant experience, strong data recording skills, and the ability to work in a team. The role requires...Level 3Shift work
- ...opportunity.ResponsibilitiesThe Senior Consultant can work either 100... .... Responsibilities: Act as a level-three escalation resource for... ...technology roadmaps, baseline security reviews, and prioritized... ...changing priorities Training, support or consulting advisory experience...SeniorWork at officeLocal area
$63k - $73k
...technical assistance to customers and internal users in support of complex Structural Engineering, CAD, and Business Management applications within the... ...issues by; Researching previous customer issues within call tracking system; Developing a method to isolate the variables...Full timeTemporary workWork at officeRemote workWorldwide3 days per week- ...achieve individual sales goals to support the store's sales and profit... ...service, and take on other senior-level responsibilities within a... ...maintenance Maintain store security including: perimeter door... ...reasonable accommodation by calling 1?(***) ***-**** ext. 2862 or by...SeniorWork experience placementLocal area
- A leading IT consulting firm is looking for an experienced Information Technology Project Manager to oversee high-budget projects throughout their lifecycle. This role involves managing complex projects, collaborating with cross-functional teams, and ensuring that business...SeniorHourly payContract work
- ...professional individual for our Desktop Support Technician 1 position with our IT organization... ...of software, hardware and procedures. Calls vendors to request service regarding... ...requirements to meet and maintain the Service Level Agreements (SLA). Review and resolve...Full timeWork experience placementWork at officeWorldwide
- ...Ideally hybrid 3+ days in Fenton,... ...Job Summary The Senior Python Developer will... ...architectural decisions to support business... ...Provide accurate level of effort estimates... ...Ensure adherence to security best practices,... ...Science, Software Engineering, Information Systems...SeniorLevel 3Contract workFor subcontractor
- ...certified Primary Stroke Center, a Level II Time Critical Diagnosis... ...and a Bronze Standard, Level 3 Geriatric Emergency Department... ...physicians who thrive in a supportive and flexible environment. Responsibilities... ...and Schedule Call Schedule: 2 weekday nights per...Level 3Flexible hoursNight shiftWeekend workWeekday work
- ...Tier 1 Help Desk Technician to join our IT support team. The ideal candidate will provide... ...typical day, you will be: Provide first-level technical support via phone, email, and chat... ...higher-tier support teams (Tier 2 or Tier 3) when necessary, while providing detailed...Work at office
$16.5 - $17.4 per hour
Overview HealthCare Support Staffing, Inc. (HSS), is a proven industry-leading national healthcare... ...person will be assigning and enforcing security policies for all computers and installing... ...per hour If you are interested, please call Lovely (***) ***-**** and email your resume...Hourly payPrivate practiceMonday to Friday- ...Desk Analyst is responsible for assisting and providing technical support for LiveScan agencies statewide, to answer questions from... ...about the LiveScan onboarding process, to answer and track incoming calls and email requests for technology assistance related to purchasing...
$60 - $65 per hour
...interdependencies, managing risks, executive level reporting, and executing on strategic... ...applications for new development and on‑going support, and direct the activities of all... ...Management Office and/or PMO delivery models Seniority Level Associate Employment Type...SeniorContract workWork experience placementFlexible hours
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