1. RESUME – James S. Umstetter
1085 Tasman Dr. #156
Sunnyvale, CA.
408-300-4244 (C)
EDUCATION
• Ph.D. in Biblical Studies with Biblical Counseling emphasis from Trinity Theological
Seminary (3.83 GPE). Thesis topic: An Exploration of the Kingdom Of God as the
metanarrative for Meaning of Life and Quality of Life as applied in the engagement
of living with Depression Disorder.
• M.S. in Telecommunications (3.92 GPE) as part of Electrical Engineering school from
Southern Methodist University
• B.S. in Biblical Studies majoring in Biblical Languages (4.0 GPE) from Emmaus Bible
College
• Current M.A. in Pastoral Counseling at Liberty University.
CORE COMPETENCIES
• 35+ years experience in Software Development, 19 years developing embedded systems, 15
years experience in MAC development
• Extensive experience with C language, assembler languages (ARM, Motorolla 68000, Intel
8080/8088/8051, MicroChip)
• Extensive experience with microprocessors and multi-core architecture (Tensilica XTENSA,
CPU, ARM cores including XSCALE, ARM9 (e.g. INTEL Pro Wireless 5116), Intel 8051,
Motorolla 68000)
• Extensive experience with embedded RTOS (ThreadX, VxWorks, Nucleus, µC, proprietary)
EMPLOYMENT HISTORY
2011-present at Fastback networks
• Wireless MAC Firmware developer for high speed backhaul radio in the 5GHz spectrum
o Designed and developed MAC layer data plane firmware for both transmit and
receive.
o Designed and developed ARQ mechanism for high data reliability.
o Designed and developed Radio Link Control (Link Adaptation) mechanism to adapt
modulation and coding scheme for most efficient data rate in view of changing link
budget.
o Designed and developed MAC layer control plane mechanism for peer to peer
control signaling.
o Designed and developed CLI for statistics and debug information visibility to the
user.
o Managed memory utilization for multi-core platform.
2000-2011 at Proxim Corp. – Senior Software Engineer
• BSP developer for MicroChip uP
o Developed Task scheduler and Power control management
• MAC developer for 802.16 based Base Station and Subscriber Station:
o Designed and implemented the interface layer between the bandwidth manager /
MPDU framer modules and the APIs of the INTEL Pro Wireless 5116 (Rosedale).
This layer constructs and parses the downlink frame prefix, downlink and uplink
maps, and downlink and uplink channel descriptors.

2. o Designed and implemented the wireless link management entity supporting
subscriber station net entry, initial and periodic ranging.
o Developed a Board Support Package for the Intel CM946.
o Maintained bandwidth manager/scheduling component.
o Direct involvement in the WIMAX forum certification process.
• MAC developer for the Proxim Proprietary Tsunami Multipoint Fixed Wireless Base Station
and Subscriber Station:
o Developed a Board Support Package for the Intel XSCALE based IXPDB425
o Sole maintainer of the code base supporting such features as VoIP QoS, DHCP relay,
subscriber station net entry.
• MAC Architect and Developer for HOMERF WLAN
o Technical editor of the HomeRF FHSS WLAN specification. Participated in the
design of MAC mechanisms in support of high speed data and QoS for both voice
and data services.
o Designed and implemented an interference avoidance mechanism.
• Automated Test software development
1994-2000 at Siemens Corp. – Senior Software Engineer
• MAC developer for FHSS based Cordless Base Station and Subscriber Station using the
DECT standard:
o Designed and implemented the driver for the baseband controller and radio
components.
o Designed and implemented the firmware to be masked into a 8051 µp based Burst
Mode Controller for subscriber stations. This involved time critical processes, such
as, timing recovery, shift register control, data collection and validation.
o Designed and implemented device drivers operating on the Motorolla 68000 (SPI
bus, keypad matrix, LCD display) for a ISDN BRI EKTS telephone set
1990-1992 at Immanuel Mission School – Computer Science Teacher
1986-1990 at URIX Corp. – Software Engineer
• Designed and implemented firmware for Digital Audio Response Equipment CCITT Q.931
layer 3 protocol interface to a digital switch
• Designed and implemented voice data transfers over T1
1981-1984 at Siemens – Software engineer
• Designed and implemented software for a space division Analog PBX
1980 at Telesciences Corp. – Software engineer
• Designed and implemented software for a Computerized Directory Assistance Search and
Retrieval system.
• Served as a customer interface for an account with Southern New England Telephone.
1974-1979 at International Computaprint Corp. – Computer Programmer
• Designed and implemented software for computerized typesetting applications.
REFERENCES: available on request