--- title: "Tech & Field Versatility - José DA COSTA" description: "Tech and field versatility is, in my profile, an **11-competency foundation** inherited from the pre-web track: **BEP Audiovisual Installer** (1998), **BAC Pro Maintenance Audiovisuelle, Electrotechni" locale: "en" canonical: "https://portfolio.josedacosta.info/en/skills/tech-field-versatility" source: "https://portfolio.josedacosta.info/en/skills/tech-field-versatility.md" html_source: "https://portfolio.josedacosta.info/en/skills/tech-field-versatility" author: "José DA COSTA" type: "skill" slug: "tech-field-versatility" generated_at: "2026-04-26T21:13:38.750Z" --- # Tech & Field Versatility Icon: 🔧 ## My definition Tech and field versatility is, in my profile, an **11-competency foundation** inherited from the pre-web track: **BEP Audiovisual Installer** (1998), **BAC Pro Maintenance Audiovisuelle, Electrotechnique et Mécanique** (2003), **MC Multimedia Sales Specialist** (2007), **BTS Computer Science** (2009). System administration, network design, IT asset management, user support, electrotechnics, schematic reading, intervention planning, specialised sales. **From cable to cloud**. that is what keeps the CTO role from cutting itself off from the field. ### Context I activate it on **3 modes** depending on the engagement. **Hands-on hardware/network**: on demand on customer infrastructure, Docker + Tailscale + Synology homelab to keep the hardware reflex sharp. **Customer-facing advisory**: continuous, direct transposition of the advisory sales patterns (diagnostic → installation → follow-up) onto the digital product posture. **Bridge between ops and engineering**: frequent, especially on the 5+ years of self-administered OVH dedicated servers at European Sourcing (Vagrant + Chef + 25 cookbooks). The hands-on fades with disuse but the **mental model stays**. ### Relevance In 2026, the operations layer is making a comeback driven by **NIS2, DORA, and data sovereignty**: certain workloads can no longer leave the corporate network, and **40% of enterprises** are projected to have adopted hybrid edge-cloud strategies by 2026. IBM maps the topic in [Helping enterprises across regulated industries leverage hybrid cloud and AI](https://www.ibm.com/new/product-blog/regulated-industries-hybrid-cloud-ai). For a scale-up CTO touching regulated sectors (health, critical finance, institutional real estate), the ability to **read a network diagram, debug DNS, and operate a hybrid cloud + on-prem infrastructure** becomes an explicit differentiator against pure SaaS profiles. ## My evidence ### Self-administering OVH dedicated servers on European Sourcing **Context:** On the European Sourcing extranet between 2010 and 2016, the infrastructure ran on **self-administered OVH dedicated Proxmox VE servers** - no managed cloud layer, no Kubernetes, no externalised ops vendor. Every B2B catalogue served in 7 languages, every traffic peak, every version upgrade rested on my ability to read the cable, the network, and the OS. For an SMB like Medialeads, externalising ops would have cost more than running it in-house - but the hands-on had to be solid. **Action:** I industrialised the environment end-to-end: provisioning with **Vagrant + Chef** and **more than 25 custom cookbooks** (Apache, MySQL, Memcache, RabbitMQ, monitoring), **Apache hardening** (TLS, security headers, disabled modules), DNS BIND management, Postfix SMTP configuration, cross-instance MySQL master-slave backups, and system monitoring with mail alerts. On the application infra side, I daily operated the dedicated **sql1, sql2 and web servers**, handled catalogue traffic spikes, and orchestrated the automated imports from the **26+ supplier connectors**. **Result:** **Stable infrastructure for more than 5 years** without any major incident, **cost of an externalised ops contract avoided** (net gain for Medialeads), and the know-how built up made it possible to absorb without friction the gradual **SVN to Git** migration in January 2016 and the gradual Symfony 2/3 rewrite. **Value added:** That polyvalence on tech and field remains my identity baseline. 20 years after my first Celiane servers (Linux/Debian, Apache, BIND, Postfix), I can still **read a network diagram, open a server terminal, debug a DNS issue** - and that differentiates me today against the majority of SaaS CTOs who lost that reading. It is exactly what makes me relevant for a scale-up role in regulated industries (NIS2, hybrid cloud + on-prem). ### Translating field customer advisory into B2B product posture **Context:** Before the web, I spent years in **field customer advisory roles**: **MC Multimedia Sales Specialist** (2007), **BAC Pro Maintenance Audiovisuel, Electrotechnique et Mécanique** (2003), **BEP Installer Counsellor for Home Equipment** (1998). The deliverable was not a Git commit but a customer leaving satisfied with their kit installed at home. When I landed on the European Sourcing extranet facing **demanding B2B buyers** (agencies, European distributors), I understood the diagnostic-advisory-installation patterns applied identically. **Action:** I applied the **advisory sales patterns** to the digital product posture: systematic **user interviews** before each major evolution (what the buyer is looking for, in what context, under what constraint), **paper prototypes** validated by buyers before code, **structured restitution** of technical trade-offs in business language (a promotional-products buyer should not have to understand TF-IDF). On sensitive evolutions (search, pricing, markings), I even reproduced the **diagnostic-installation-follow-up** sales pattern: identify a need, propose an adapted solution, accompany the adoption. **Result:** **Extranet adopted by B2B buyers with minimal training**, **low rejection rate** on shipped evolutions, and the trust built up made it possible across 6 years to hold the Software Engineer then Senior Software Engineer role as a true business interlocutor - not a simple executor. **Value added:** The field empathy forged at 16 in retail stays embedded in my CTO posture today: **a technical decision must remain legible business-side** without loss of fidelity, and the best way to verify it is to go to the end user. That is exactly what makes me effective in CTO advisory at ACCENSEO on field-heavy industries (food trucks, viticulture, automotive, hospitality) where the digital product is just one tool in a very physical value chain. ## My self-critique ### Mastery level Level **Confirmed**. Less a technical domain than a **practice identity** inherited from [my pre-web journey](/en/journey). audiovisual installer, multimedia sales advisor, fleet management and user support. 11 skills covering system administration, network design, fleet management, user support, electrical engineering, schematic reading, intervention organisation, specialised sales. The hands-on fades with disuse but the mental model stays - self-administered OVH dedicated servers for 5+ years, field customer advisory transposed to B2B extranet stewardship. ### Importance in my profile Identity narrative and **operational empathy**: it is what prevents the CTO role from cutting itself off from the field and makes tech decisions legible ops-side, support-side, and end-customer-side. For a scale-up CTO role in an industry touching hardware, edge, or regulated sectors (NIS2, on-prem), it is also a differentiator - few SaaS CTOs have kept a reading of cabling, datacentre, and user fleet. ### Advice (for myself and others) ### My two field gestures **Visit a datacenter or an ops team at least once a year** and run an active homelab, even minimal. To others: *do not despise the physical infra layer*. especially in the regulated industries of 2026 where NIS2 brings ops back to the foreground. An hour spent understanding the cable saves a day of network debugging later. ## My evolution in this skill ### Role in my professional project Tech and field versatility is **an identity foundation rather than an intensive development axis**. In the 24-month plan, it enables a CTO scale-up positioning in regulated or hybrid sectors (health, real estate, industrial) where the cloud / on-prem / edge separation matters. Without it, the profile is reduced to pure SaaS and loses access to industries that stay on tier-1 hybrid. ### Mid-term target level Maintaining the level is enough; the goal is observable and operational: **diagnose a network incident on an SMB fleet in less than 60 minutes**, and lead a **hybrid cloud + on-prem ops team** without depending on an external consultant. ### Current training Occasional homelab maintenance (Docker + [Tailscale](https://tailscale.com/) + Synology), occasional participation in ACCENSEO hardware interventions. Master in Software Engineering active, regularly reactivating the network / system layer. ### Future training No formal short-term training planned. Possible **CKAD** or networking certification (CCNA associate level) cohort in 2027 if the target role tilts toward a hybrid regulated industry. ## Progression across journey This skill was developed across 9 different journey items. - **1997** - [BEP ICEF (Home Equipment Installer & Advisor), Specialization: Audiovisual Electronics & Antennas](https://portfolio.josedacosta.info/en/journey/bep-icef.md) (education) - Confidence: 2/5 - **1999** - [CTO · Founder · technical director](https://portfolio.josedacosta.info/en/journey/celiane-founder.md) (entrepreneurship) - Confidence: 2/5 - **1999** - [Vocational Baccalaureate in Household & Institutional Equipment Maintenance (MAEMC), Specialization: Electrical Engineering](https://portfolio.josedacosta.info/en/journey/bac-pro-maemc.md) (education) - Confidence: 2/5 - **2001** - [BTS IG (IT Management)](https://portfolio.josedacosta.info/en/journey/bts-computer-science.md) (education) - Confidence: 3/5 - **2001** - [Supplementary Certificate in Specialized Multimedia Product Sales](https://portfolio.josedacosta.info/en/journey/mc-vendeur-produits-multimedia.md) (education) - Confidence: 2/5 - **2008** - [Junior Software Engineer · PHP Joomla Webmaster Developer](https://portfolio.josedacosta.info/en/journey/ministere-sante-webmaster.md) (experience) - Confidence: 1/5 - **2009** - [Software Engineer · PHP Zend Framework Developer](https://portfolio.josedacosta.info/en/journey/european-sourcing-engineer.md) (experience) - Confidence: 4/5 - **2013** - [Senior Software Engineer · Lead PHP Symfony Developer](https://portfolio.josedacosta.info/en/journey/medialeads-senior-engineer.md) (experience) - Confidence: 3/5 - **2024** - [CTO · Founder · technical director](https://portfolio.josedacosta.info/en/journey/accenseo-founder.md) (entrepreneurship) - Confidence: 4/5 Interactive version with navigation: https://portfolio.josedacosta.info/en/skills/tech-field-versatility