Technical Project Manager TeleWorld SolutionsTechnical Project ManagerPlano, TXFull timeWith the experience of hundreds of thousands of successful implementations, including macro, DAS, Small Cells, and Wi-Fi, the world’s leading network operators and OEMs trust our knowledge and experience to plan, perform, troubleshoot, and implement an array of technologies and solutions. TeleWorld Solutions is a strategic wireless engineering and consulting firm offering network operators, OEMs and tower companies turnkey design, optimization, network dimensioning and deployment services.
NewSenior Project Manager JobotSenior Project ManagerDallas, TX$95,000–$135,000 / yearA premier Dallas-Fort Worth construction management and design-build firm delivering commercial, public, and private ground-up, renovation, and interior finish-out projects for nationally recognized clients across retail, healthcare, education, and corporate sectors. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.
Architectural Project Manager JobotArchitectural Project ManagerPlano, TX$75,000–$90,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Here are some of the experience we are looking for: putting together full sets of CDs, permitting, RFIs, and site visits for upfront verification, during construction, punch-lists, and meeting with the city for permit related requirements.
NewProject Manager/Sr. PM - HEALTHCARE CONSTRUCTION JobotProject Manager/Sr. PM - HEALTHCARE CONSTRUCTIONDallas, TX$125,000–$175,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Our expertise lies in building healthcare facilities, and our award-winning portfolio includes a diverse range of projects such as commercial, educational, faith-based, industrial, and recreational facilities.
Program Manager System OneProgram ManagerPlano, TX$170 / yearHighly cross-functional collaboration across teams and stakeholders. • Function as a central command point for Mass Market documentation and tracking.
Fiber Splicing Manager Sunrise TelecomFiber Splicing ManagerForest Hill, TX$32–$40 / hourFull timeThis role manages splicing crews, coordinates with project managers and construction teams, enforces quality control, and ensures all documentation and testing meet customer and regulatory requirements. Proficiency with fusion splicers, OTDRs, power meters, and related test equipment.
NewProject Manager (Electrical Construction) JobotProject Manager (Electrical Construction)Dallas, TX$120,000–$175,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. ● Bachelor’s degree in a related field (Project Management, Construction Management, Business, Engineering, etc.), paired with industry experience OR an overall appropriate combination of certification(s), experience, and education (journeyman or master electrician’s license).
NewSenior Project Manager - Commercial Construction JobotSenior Project Manager - Commercial ConstructionAddison, TX$140,000–$160,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Over the years our reputation for providing our people with the very best has caught the eye of some reputable companies who have chosen to use us as their Prime Commercial Contractor!
NewSr. Project Manager - Heavy Civil Infrastructure JobotSr. Project Manager - Heavy Civil InfrastructureDallas, TX$150,000–$170,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. An established, employee-owned heavy civil contractor is expanding its Texas operations and is adding a Senior Project Manager to support multiple large, complex infrastructure projects.
NewSenior Electrical Project Manager - Relocation JobotSenior Electrical Project Manager - RelocationPlano, TX$170,000–$200,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. We work across diverse markets including commercial, industrial, healthcare, education, data/technology, and public works, delivering projects through design-build, design-assist, and plan-spec approaches.
NewSenior Product Manager - Remote IntradoSenior Product Manager - RemoteDallas, TXRemote$120,000–$150,000 / yearWorking within Intrado’s product operating model, you will partner closely with Sales, Customer Success, Engineering, Network Operations, Product Operations, Regulatory Affairs, and telecommunications service providers to define and deliver solutions that meet evolving customer, industry, and regulatory requirements. The ideal candidate brings experience in telecommunications, emergency communications, or network-based services and has a strong understanding of Wireline, VoIP, NG911, location information services, and the public safety ecosystem.
BMS Automation Project Manager JobotBMS Automation Project ManagerDallas, TX$100,000–$130,000 / yearA Texas-based building automation system software and controls contractor that specializes in the installation, repair, and service of BACnet DDC control and energy management systems. Texas-based building automation system software and controls contractor .
NewAssistant Project Manager- Energy Management / Building Automation JobotAssistant Project Manager- Energy Management / Building AutomationRichardson, TX$80,000–$110,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. This role works closely with Project Managers, engineers, field technicians, and customers to keep projects organized, on schedule, and financially aligned.
Commercial Project Manager / Estimator Management Recruiters of DavidsonCommercial Project Manager / EstimatorDallas, TXFull timeWe've partnered with a well-established commercial glass and glazing contractor in the Dallas market that is continuing to grow and is looking to add both a Project Manager and an Estimator to their team. This is an excellent opportunity to join a respected contractor with a strong reputation, a steady backlog of work, and opportunities for long-term growth.
Legal Recruiting Coordinator Reed Smith USLegal Recruiting CoordinatorDallas, Texas$35.09–$40.86Full timeRecruiting duties include, but are not limited to, coordination of the campus recruitment process and summer associate program, new associate on-boarding, orientation and integration, and assistance with recruitment of lateral lawyers for the Dallas and Denver offices. Direct source candidates based on skillset needs, work with search firms to identify candidates, prescreen applications, schedule interviews, conduct pre-hire diligence, prepare offers and facilitate on-boarding.
NewIT Project Manager True North Consultants, Inc.IT Project ManagerPlano, TXUnlike highly technical architecture roles, this position focuses on project leadership, stakeholder communication, governance, organizational change management, and successful execution. This is an outstanding opportunity for a project management professional who enjoys working across technical and business teams, driving projects from planning through implementation, and making a visible impact within a global manufacturing organization.
New4G/5G RAN Test Engineer IV TeleWorld Solutions4G/5G RAN Test Engineer IVPlano, TXFull timeWith the experience of hundreds of thousands of successful implementations, including macro, DAS, Small Cells, and Wi-Fi, the world’s leading network operators and OEMs trust our knowledge and experience to plan, perform, troubleshoot, and implement an array of technologies and solutions. TeleWorld Solutions is a strategic wireless engineering and consulting firm offering network operators, OEMs and tower companies turnkey design, optimization, network dimensioning and deployment services.
Senior Project Manager (Salesforce / SaaS Implementation) Vaco LLCSenior Project Manager (Salesforce / SaaS Implementation)Dallas, TX$75–$100 / hourThe Senior Project Manager (Software Delivery) will lead cross-functional teams (internal staff, contractors, and vendors), manage multi-million dollar budgets, develop detailed project plans, mitigate risks, drive change management and user adoption, and deliver executive-level communications and updates to senior leadership. JOB REQUIREMENTS Enterprise Project / Program Leadership (8+ years) – SaaS Implementation / Salesforce (required) / Sitecore (strongly preferred) | Leading Complex Enterprise Projects and Digital Transformation Initiatives / Managing Cross-Functional Teams | Delivering Technology Solutions within Scope / Budget / Schedule.
NewCommercial Construction Assistant Project Manager HITT ContractingCommercial Construction Assistant Project ManagerDallas, TXGather data, interpret it into meaningful information, and relay that information through clear, concise communication strategies; ability to see how pieces and processes fit into and affect the bigger picture/business model. An Assistant Project Manager (APM) obtains, evaluates, coordinates and distributes the information and authorizations necessary to construct projects on time, within budget and to the quality specified.
Supply Chain Project Manager Vaco LLCSupply Chain Project ManagerFrisco, TX$60Determining compensation for this role (and others) at Vaco by Highspring depends upon a wide array of factors including but not limited to: the individual’s skill sets, experience and training; licensure and certification requirements; office location and other geographic considerations; other business and organizational needs. Determining compensation for this role (and others) at Vaco/Highspring depends upon a wide array of factors including but not limited to the individual’s skill sets, experience and training, licensure and certifications, office location and other geographic considerations, as well as other business and organizational needs.
Senior Project Manager Kforce Inc.Senior Project ManagerDallas, TX$63–$71Employee pay is based on factors like relevant education, qualifications, certifications, experience, skills, seniority, location, performance, union contract and business needs. By clicking “Apply Today” you agree to receive calls, AI-generated calls, text messages or emails from Kforce and its affiliates, and service providers.
Senior Facilities Project Manager Southwest AirlinesSenior Facilities Project ManagerDallas, TX$125,900–$139,900 / yearPlan, direct, and implement multiple large scale projects including, but not limited to assessing and validating Customers requests; overseeing the bidding and procurement process; establishing objectives and timelines; developing, managing, and tracking project budgets; managing project scope; anticipating challenges and recommending strategic solutions; and preparing and presenting project reports to Executive Leadership. Serving as the central point of accountability, you’ll balance business needs with facilities execution, guide project planning and strategy, and oversee procurement and construction activities, while ensuring strong governance, clear reporting, and consistent communication to deliver safe, efficient, and high-quality outcomes with minimal operational disruption.
NewFederal SAP Concur Implementation Project Manager - Remote Censeo Consulting GroupFederal SAP Concur Implementation Project Manager - RemoteDallas, TXRemote$90,000–$140,000 / yearDefines agency’s change management and transition communication requirements and performance metrics with a focus on mitigating adoption risks and satisfying customer information needs Identify agency stakeholder groups, assess stakeholder information needs, and prepare communication planning materials outlining key messages, methods, and timing by stakeholder group. Censeo is seeking a consultant to serve as a Customer Engagement Manager to support the GSA and other federal client agencies by providing customer engagement and operations planning support to customer agencies transitioning to the GO.gov e-gov travel services (ETS) shared service.
Project Manager, Accounting & Reporting Advisory Services bdo consultingProject Manager, Accounting & Reporting Advisory ServicesDallas, TX$125,000–$140,000 / yearThe Accounting & Reporting Advisory Services Project Manager will be part of an Accounting & Reporting Advisory Services team supporting projects in the areas of Technology Enablement; Business Process Improvement; Finance and Business Operations; in addition to Business Transformation and Operational Excellence efforts. The annual allocation to the ESOP is fully funded by BDO through investments in company stock and grants employees the chance to grow their wealth over time as their shares vest and grow in value with the firm’s success, with no employee contributions.
Senior MEP Project Manager Michael Page USASenior MEP Project ManagerSouthlake, TX$108,000–$132,000 / yearFull timeThe Senior MEP Project Manager will lead and manage mechanical, electrical, and plumbing (MEP) projects for industrial and manufacturing clients, ensuring they are completed on time and within budget. A successful Senior MEP Project Manager should have: A strong background in construction management, specifically within the industrial or manufacturing sector.
Senior MEP Project Manager - MEP XP Required Michael Page USASenior MEP Project Manager - MEP XP RequiredSouthlake, TX$108,000–$132,000 / yearFull timeThe Senior MEP Project Manager will lead and manage mechanical, electrical, and plumbing (MEP) projects for industrial and manufacturing clients, ensuring they are completed on time and within budget. A successful Senior MEP Project Manager should have: A strong background in construction management, specifically within the industrial or manufacturing sector.
Construction Project Manager - Healthcare Michael Page USAConstruction Project Manager - HealthcareCarrollton, TX$98,600–$148,600 / yearFull timeA successful Construction Project Manager - Healthcare should have: Bachelor's degree in Construction Management, Construction Science, Civil Engineering, or related field preferred. Excellent communication and interpersonal skills, with the ability to influence decision-making and build lasting relationships with clients, subcontractors, and internal teams.
Project Manager Michael Page USAProject ManagerRichardson, TX$120,000–$150,000 / yearFull timeThe role of the Project Manager is to provide leadership & management for the entire life-cycle of an assigned construction project to include: Pre-development input on design, cost and schedule; oversight and evaluation of on-site personnel; coordination of Subcontractors; ensure work proceeds as specified, on budget and on schedule; all project documentation is properly completed; and the project is successfully closed out and delivered to Owner. Directs and supervises work of project administration staff and construction engineers, as well as works in partnership with project superintendents to establish operational priorities.
Project Manager - Healthcare Construction Michael Page USAProject Manager - Healthcare ConstructionDallas, TX$155,000–$170,000 / yearFull timeThe Project Manager - Healthcare Construction will oversee the planning, coordination, and execution of healthcare construction projects, ensuring they are delivered on time and within budget. A successful Project Manager - Healthcare Construction should have: A strong background in managing healthcare construction projects within the business services industry.
MEP Project Manager (Mission Critical/Data Centers -Travel) Michael Page USAMEP Project Manager (Mission Critical/Data Centers -Travel)Dallas, TX$150,000–$180,000 / yearFull timeThis role is ideal for professionals who excel in highly technical environments and enjoy leading the coordination and execution of complex MEP systems on data center projects across Texas. A top-tier general contractor is looking to add an MEP Project Manager to support its rapidly growing Data Center/Mission Critical division.
Assistant Project Manager - Construction - APPLY NOW!!! Michael Page USAAssistant Project Manager - Construction - APPLY NOW!!!Dallas, TX$104,000–$134,500 / yearFull timeThis general contractor specializes in design-build delivery, construction management, and ground-up development across high-impact markets including manufacturing, life sciences, healthcare, corporate offices, food & beverage, and distribution/logistics. Assist with coordinating day‑to‑day tasks to help the team meet key milestones, including design coordination, procurement, construction activities, startup, commissioning, punch list, and closeout.
NewDirector of Engineering ECLARODirector of EngineeringRichardson, TXPosition Overview: Director of Engineering is a high-impact senior leadership role, responsible for the end-to-end cellular engineering, including mobile network (core and RAN) management as well as deployment and technical management of innovative wholesale solutions in a secure, effective, scalable and commercially viable manner, to customers across the world. Lead and manage a geographically dispersed engineering team responsible for both open-source and vendor supplied LTE core (MME, SGW, PGW), IMS (VoLTE / VoNR) as well as 5G core (AMF, SMF, UPF, UDM, AUSF, PCF, NRF) infrastructure.
NewDirector of Federal Growth & Business Development GCB Services LLCDirector of Federal Growth & Business DevelopmentAllen, TXFull timeFounded in 2004, GCB Services LLC is an established technology services company with more than two decades of experience delivering large-scale enterprise technology, telecommunications, and network infrastructure projects across the United States. The successful candidate will build a sustainable multi-million-dollar pipeline, strengthen GCB's position with Federal agencies and prime contractors, and create a disciplined, repeatable growth engine focused on profitable and strategic opportunities.
Construction Manager (TX) - Telecommunications GAC Enterprises, LLCConstruction Manager (TX) - TelecommunicationsIrving, TX$75,000–$85,000We're looking for a Construction Manager I to support coordination and execution of construction projects, working closely with Field Supervisors, crews, and Project Managers. This is the entry point into Construction Management — perfect for someone ready to develop project coordination, planning, and leadership skills.
Telecommunications Strategy Senior Manager Accenture PlcTelecommunications Strategy Senior ManagerIrving, TXLead transformative engagements that reimagine how telecommunications companies operate - championing customer value management frameworks, AI-first network operations, and data-driven commercial models that deliver measurable, year-over-year performance gains. The Work: Apply deep Telecommunications expertise to help clients rethink their growth and profitability strategies - from redefining consumer and enterprise go-to-market models to designing AI-native network and service platforms that create lasting competitive moats.
Telecommunications Superintendent Kiewit CorpTelecommunications SuperintendentDallas, TXWe offer our fulltime staff employees a comprehensive benefits package that's among the best in our industry, including top-tier medical, dental and vision plans covering eligible employees and dependents, voluntary wellness and employee assistance programs, life insurance, disability, retirement plans with matching, and generous paid time off. The Telecommunications Superintendent will work closely with Project Management, Engineering, Safety, and trade partners to deliver complex structured cabling and fiber systems in a fast‑paced, highly coordinated data center environment.
VP Of Operations- Telecommunications Ultimate Staffing ServicesVP Of Operations- TelecommunicationsBalch Springs, Texas$250,000–$275,000This executive will play a critical role in driving operational excellence, scaling growth, improving service reliability, and ensuring consistent execution across multiple markets. The ideal candidate is a hands-on, metrics-driven operator with deep experience leading telecom or fiber-based operations in complex, field-driven environments.
Telecommunications Field Engineer - Industrial Kiewit CorpTelecommunications Field Engineer - IndustrialDallas, TXThis role is responsible for supporting field execution by coordinating work activities, tracking quantities and progress, assisting with quality control, and partnering closely with Superintendents, Project Managers, and trade partners to ensure telecom scopes are delivered safely, efficiently, and in compliance with project requirements. We offer our fulltime staff employees a comprehensive benefits package that's among the best in our industry, including top-tier medical, dental and vision plans covering eligible employees and dependents, voluntary wellness and employee assistance programs, life insurance, disability, retirement plans with matching, and generous paid time off.
Telecommunications Central Office Lead Installer Level IV Pearce ServicesTelecommunications Central Office Lead Installer Level IVDallas, TexasPearce provides technical maintenance, repair, operations, and engineering services for uninterruptible power supply (UPS) systems, backup power generators, battery energy storage systems (BESS), critical cooling systems, and other electrical and mechanical infrastructure across end markets such as renewable energy, telecom, and data centers. Founded in 1998, Pearce has more than 4,000 employees and 28 locations across the U.S. Pearce is a wholly owned subsidiary of CBRE Group, Inc., the world’s largest commercial real estate services and investment firm.
Lead, Enterprise Account SE - Telecommunications Salesforce IncLead, Enterprise Account SE - TelecommunicationsDallas, TX$134,750–$180,250 / yearThe Solution Engineer must have a strong desire to demonstrate their technical and sales skills, including the ability to solicit business requirements, develop a technical sales strategy, configure and successfully demonstrate solutions that address those requirements, and deliver measurable business value. This person leads pre-sales activities - from discovery and solution design to executive-level demos - while architecting and hands-on building end-to-end Salesforce solutions that tackle complex industry challenges.
Telecommunications Technician WAVE OF INSTALLATION LLCTelecommunications TechnicianArlington, TXRemoteYou will also be troubleshooting systems that are having trouble, running diagnostic tests, ordering replacement components, and ensuring every system you touch is working properly. As a Telecommunications Technician, you will be installing new telecommunications systems, repairing existing telecommunications systems, and upgrading outdated equipment and systems.
Senior Network Engineer (Telecommunications) Frontier Communications Parent IncSenior Network Engineer (Telecommunications)Dallas, TX$80,000–$110,000 / yearOur responsibility is all inclusive: Provision Ethernet services through Frontier's network provisioning various network devices; ensuring that network devices are maintained; configuring and troubleshooting the network that supports connectivity to customer NID's; producing detailed implementation instructions or carrying out required changes to complete tasks/projects; troubleshooting failed installs; changes/improvements requested by management and Engineering and Planning groups; and DCP also update/maintain all network documentation as required. Candidate should be 100% professional and capable of effectively communicating (written and verbal) complex issues to audiences with various skill levels, organizational skills, and computer skills particularly around Microsoft Office products.
Senior Project Manager - Data Center CBRE Group IncSenior Project Manager - Data CenterDallas, TXThe PM will work with the extended site team to develop the program schedule and establish key milestones for delivery of the program ensuring all financial targets, schedule targets are met in alignment to the customers goals. The Project Manager reviews all job cost postings for accuracy and completeness, including but not limited to, the preparation of invoices, customer collections and periodic financial reporting to the customer and management.
Network Project Manager StratAcuity Staffing Partners IncNetwork Project ManagerIrving, TXIn terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Everforth Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts.
Project Manager I / II (MEP Engineering) LuxusProject Manager I / II (MEP Engineering)Dallas, TX$90,000–$135,000 / yearKeywords: Project Manager, MEP Project Manager, Mechanical Engineering, Electrical Engineering, Architectural Engineering, Revit, AutoCAD, Bluebeam, Construction Administration, Mission Critical, Building Systems, Engineering Project Management, Dallas Engineering Jobs, PE License, Multidisciplinary Coordination, Consulting Engineering. Multidisciplinary Coordination: Integrate complex mechanical, electrical, plumbing, structural, architectural, civil, and technology systems, fostering total alignment between internal engineering teams, sub-consultants, and ownership groups.
Data Center Cabling Project Manager Align CommunicationsData Center Cabling Project ManagerGrand Prairie, TXIf you've worked as a Data Center Cabling Superintendent, Cabling Superintendent, Cabling Lead, Lead Technician, Lead Fiber Technician, Foreman, Field Supervisor, Site Supervisor, Installation Supervisor, or similar leadership role, we'd love to hear from you. Our teams have flawless track records of delivering technical solutions and have established long-standing relationships with an impressive client list of both Global 1000 and SMB clients.
Construction/Project Manager SIRISConstruction/Project ManagerDallas, TX$80,000–$100,000 / yearThe proposed Construction Administrator will have experience supporting complex construction projects in healthcare and/or federal environments (e.g., VA, DoD, USACE, GSA), including: Hospital facility upgrades and infrastructure improvements, including electrical system enhancements. The Construction Manager reports to the Program Manager and collaborates closely with VA client staff, contractors, and project teams to analyze data, generate reports, and support informed decision-making on major construction projects.
Telecom MSP Project Manager Remote AireSpringTelecom MSP Project Manager RemoteDallas, TXRemoteWe have received more than 100 coveted industry awards including "Product of the Year- SD-WAN and UCaaS", "Excellence in Customer Service", "Unified Communications Excellence", "Best in Show," "Best Telecom Deal" and "Top Channel Program". The Project Coordinator will assist with tracking project activities, coordinating with internal teams and telecom carriers, and helping ensure projects move forward smoothly and on schedule.
Construction/Project Manager Siris LLCConstruction/Project ManagerDallas, TX$80,000–$100,000 / yearRelevant Experience Profile The proposed Construction Administrator will have experience supporting complex construction projects in healthcare and/or federal environments (e.g., VA, DoD, USACE, GSA), including: Hospital facility upgrades and infrastructure improvements, including electrical system enhancements. About SIRIS SIRIS, LLC is a CVE-verified, Service-Disabled Veteran-Owned Small Business (SDVOSB) specializing in construction management, project management, and commissioning services for federal, healthcare, and institutional clients nationwide.
Project Manager II Lumos Networks Corp.Project Manager IIDallas, TX$74,340–$90,000 / yearAbout Segra: Segra owns and operates a wide and dense fiber-optic infrastructure footprint that provides state-of-the-art connectivity, cybersecurity, voice, cloud and colocation solutions, all backed by industry-leading service and reliability. We invest in the communities we serve by hiring locally, empowering our teams, and continually upgrading our network infrastructure to deliver smarter, stronger technology solutions.