Deniz Aksoy

GTM @ Sierra

United Kingdom

About

Sales Executive with over a decade of success driving revenue growth, customer impact, and strategic expansion across high-growth SaaS and AI environments. Proven ability to lead complex, multi-stakeholder sales cycles and deliver value through solution-based selling. Adept at translating technical products into business outcomes, building trusted enterprise relationships, and collaborating cross-functionally with product and engineering teams. Experienced at scaling go-to-market strategies at companies like Slack and DeepL, consistently exceeding targets while upholding high standards of craftsmanship, intensity, and trust.

Experience

  • Sales Director at Sierra
    Sep 2025 - Present · 10 mos

    Sierra is the platform that helps businesses build better, more human customer experiences with AI. Founded by industry veterans Bret Taylor and Clay Bavor, Sierra enables businesses to deploy autonomous AI agents that delight and support customers in the moments that matter. Our AI agents integrate with key systems and provide fast, personalized, always-on support on any channel, improving customer satisfaction and operational efficiency. Trusted by leading brands like Deliveroo, Sonos, and Next, Sierra’s business model combines enterprise-ready, fully-supported deployment with outcome-based pricing to align our success to our customers’ success.

  • DeepL (Hybrid)
    • Sr. Account Executive, Enterprise | UKI
      Apr 2025 - Aug 2025 · 5 mos

      • Applying a data-driven prospecting approach to land and expand enterprise accounts • Driving GTM efforts with Marketing to launch scalable, value-driven ABM campaigns • Leading GTM strategy to scale market presence through co-selling with SI's and tech alliances

    • Account Executive, Enterprise | UKI
      Mar 2024 - Mar 2025 · 1 yr 1 mo

      • Managing complex sales cycles with a focus on AI translation solutions (UKI >5k FTEs) • Driving DeepL’s shift from B2C to B2B enterprise selling with a targeted GTM strategy • Achieving 127.19% annual attainment, closing around 800k€ in my first 10 months Attainment: FY24: 127.19% (opted out of ramp)

  • Slack (Full-time · 5 yrs 9 mos)
    • Sr. Account Executive, Enterprise | PL & Baltics
      Feb 2023 - Dec 2023 · 11 mos

      • Scaling market presence by building partnerships and co-selling motions with SI's and tech alliances • Designing and deploying a scalable Go-To-Market playbook across EMEA enterprise teams • Leading consultative discovery to understand complex business needs and drive stakeholder alignment Awards: FY24 H1 Top Performer (ENT) & H1 Sales Elevate Champion FY23 Q1+Q3 Top Performer, Club 100, FY23 Annual Top Performer (ENT) & Presidents Club Attainment: FY24/H1: 134.95% (ENT) FY23: 249.54% (ENT)

    • Account Executive, Enterprise | CEE
      Aug 2021 - Jan 2023 · 1 yr 6 mos

      • Managing top-of-funnel and full sales cycle with key accounts, guiding non-technical stakeholders • Fostering customer relationships through the SFDC acquisition, maintaining momentum • Partnering with SFDC account teams to co-develop account strategies and value propositions Awards: FY22 Rookie of the Year (ENT) & Presidents Club (ENT) Attainment: FY22: 236.7% | H1: 277.7% (MM) & H2: 193.3% (ENT)

    • Sr. Account Executive, Mid-Market | DACH
      Aug 2020 - Jul 2021 · 1 yr

      • Driving regional GTM strategy development and refining sales motions • Deepening mid-market relationships through ROI-driven business case development • Delivering high-impact demos and workshops to align product capabilities with buyer priorities Awards: FY21 Q3 Mega Deal (MM) Attainment: FY22 H1: 277.7% (FY22 H2 promoted to ENT) FY21 H2: 142.5%

  • Md7 (Greater Dublin · On-site)
    • Team Lead Prepayment
      Mar 2017 - Mar 2018 · 1 yr 1 mo

      • Managing a sales team responsible for closing high-margin prepayment contracts • Improving team performance through enablement and real-time feedback loops • Implementing market-driven strategies based on trend analysis and deal conversion metrics

    • Senior Lease Consultant
      Jul 2016 - Feb 2017 · 8 mos

      • Establishing strong business relationships with prospects, landlords and business partners • Achieving high activity throughout the full sales life cycle (50+ calls per day) • Promotion to Team Lead due to overall performance and action-oriented attitude

    • Lease Consultant
      Sep 2015 - Jun 2016 · 10 mos

      • Generating ≈25% savings for operators by negotiating their lease contracts with landlords • Identifying and cold-calling private, corporate or governmental landlords • Promotion to Senior Consultant after consistently overachieving sales targets

  • Consultant for East-Asia at University of Hamburg
    May 2014 - May 2015 · 1 yr 1 mo

    • Guiding incoming Asian students through the maze of accessing financial aid • Providing social, legal and cultural information to new students • Encouraging enthusiastically Asian cultures by establishing cooking classes for students