{"source":"Breaknorm","page":"https://breaknorm.co/tools/tetra","license":"https://breaknorm.co/terms","slug":"tetra","name":"TETRA","vendor":"ETSI","category":"network-protocols","website":null,"jobs":{"companies":51,"postings":202,"posting_companies":97,"posted_30d":121,"companies_30d":69,"posted_90d":172,"companies_90d":88,"by_country":[["US",11],["DE",10],["GB",7],["FR",4],["IT",2],["NO",2],["SE",2],["SG",2],["AT",1],["AU",1],["BE",1],["BR",1]],"by_headcount":[["1001-5000",14],["10001+",10],["51-200",8],["11-50",4],["2-10",4],["201-500",4],["501-1000",4],["5001-10000",3]],"by_vertical":[["utilities_infrastructure",11],["property_construction",7],["technology_software",7],["transport_logistics_rental",7],["manufacturing_industry",5],["business_finance_services",4],["community_associations_public",3],["automotive",2],["consumer_services_leisure",2],["media_content",2],["commerce_trade",1]],"by_function":[["engineering_non_software",61,33],["skilled_trades_and_field_service",28,20],["it_operations_and_business_systems",15,12],["software_engineering",14,9],["product_program_and_project_management",11,8],["sales",8,3],["customer_service_and_success",7,4],["construction_and_civil",5,3],["business_development_and_strategy",2,2],["design_and_ux",1,1],["finance_and_accounting",1,1],["general_management_and_consulting",1,1],["hospitality_and_food_service",1,1],["manufacturing_and_production",1,1],["marketing_and_communications",1,1],["public_safety_and_protective_services",1,1],["quality_safety_and_environment",1,1]],"co_tech":[["lte",35,23],["5g",34,19],["p25",28,10],["linux",17,7],["autocad",11,9],["jira",10,5],["mpls",10,8],["cisco",8,7],["tcp-ip",8,6],["vlan",8,7],["c-plus-plus",7,6],["ethernet",7,4],["ibwave",7,6],["wireshark",7,5],["ieee-802-11",6,4],["microsoft-windows",6,3],["rtp",6,4],["servicenow",6,3],["wi-fi",6,4],["aveva",5,3],["java",5,4],["microsoft-project",5,4],["sip",5,3],["starlink",5,5],["vmware",5,4],["ansible",4,4]]},"overlap":0,"dns":null,"outbound":null,"top_note":"Companies with 201+ employees and high-confidence evidence in their own postings; job boards and portals left out.","top_total":13,"top":[{"domain":"velbert.de","name":"Stadt Velbert","country":"DE","city":"Velbert","headcount":"501-1000","leaf":"municipal_authorities_and_general_public_bodies","summary":"Stadt Velbert is the official municipal portal of the city of Velbert, Germany, that provides citizens and businesses with digital administrative services."},{"domain":"wsw-online.de","name":"WSW Wuppertaler Stadtwerke GmbH","country":"DE","city":"Wuppertal","headcount":"1001-5000","leaf":"electricity_grid_operators","summary":"WSW Wuppertaler Stadtwerke GmbH is a municipal utility in Wuppertal, Germany that provides electricity, gas, district heating, public transport ticketing, drink."},{"domain":"lfv.se","name":"LFV","country":"SE","city":"Norrköping","headcount":"1001-5000","leaf":"other_aviation_services","summary":"LFV is a state-owned business unit that provides air traffic control and aviation services in Sweden and internationally for both civil and military aviation."},{"domain":"rhomberg-sersa.com","name":"Rhomberg Sersa Rail Group","country":"AT","city":"Bregenz","headcount":"1001-5000","leaf":"civil_infrastructure_contractors","summary":"Rhomberg Sersa Rail Group is a service provider that plans, builds and maintains rail infrastructure worldwide, offering track construction, tunnel refurbishmen."},{"domain":"keolis.com","name":"Keolis S.A. (Keolis Group)","country":null,"city":null,"headcount":"10001+","leaf":"scheduled_bus_operators","summary":"Keolis S.A."},{"domain":"madre-me.com","name":"Madre Integrated Engineering","country":"QA","city":"East Brisbane","headcount":"501-1000","leaf":"other_construction_and_building_engineering","summary":"Madre Integrated Engineering is a manpower and engineering staffing service that provides workforce support for large-scale construction and infrastructure proj."},{"domain":"ratp.fr","name":"RATP","country":"FR","city":null,"headcount":"10001+","leaf":"other_public_transit_and_transport_infrastructure","summary":"RATP is a public transport operator in France that provides metro, bus, tramway, RER and Transilien services."},{"domain":"hitachirail.com","name":"Hitachi Rail","country":"GB","city":null,"headcount":"10001+","leaf":"railway_rolling_stock_and_components","summary":"Hitachi Rail is a manufacturer that develops and supplies rail transport solutions for railway operators worldwide."},{"domain":"vattenfall.se","name":"Vattenfall","country":"SE","city":"Solna","headcount":"10001+","leaf":"electricity_grid_operators","summary":"Vattenfall is an electricity supplier in Sweden that offers fossil-free electricity contracts for private and business customers."},{"domain":"zenitel.com","name":"Zenitel","country":"GB","city":"Oslo","headcount":"201-500","leaf":"it_and_telecoms_provider","summary":"Zenitel is a technology company that provides intelligent critical communication solutions for safety and security applications across corporate, public, educat."},{"domain":"metro.waw.pl","name":"Metro Warszawskie","country":"PL","city":"Warszawa","headcount":"1001-5000","leaf":"scheduled_bus_operators","summary":"Metro Warszawskie is a metro rail operator in Warsaw that runs the city's metro lines and manages station construction and passenger service."},{"domain":"omega365.com","name":"Omega 365","country":"NO","city":null,"headcount":"201-500","leaf":"industrial_engineering_consulting","summary":"Omega 365 is a technology and consulting company that provides software and expert consulting for complex projects in oil and gas, energy, infrastructure, and b."},{"domain":"hitachi.com","name":"Hitachi","country":"US","city":null,"headcount":"10001+","leaf":"ems_contract_manufacturing","summary":"Hitachi is a global technology and engineering company that provides digital, energy, mobility, industry, measurement and healthcare solutions for businesses an."}],"footprint_top_total":0,"footprint_top_note":"Companies with 1,000+ employees whose website or DNS carries TETRA but whose postings never name it: the part of the market job data alone misses.","footprint_top":[],"countries":[],"as_of":"2026-11-04","updated_at":"2026-11-04","hash":"cab4251bbd6c0dee","index_tier":1}